fix remaining getstrtoken uses without null-check.

s/preview

@@ -22,8 +22,8 @@ exit $2 # otherwise
 function build() {
 assert_dir $SOURCE
 cd $SOURCE
-git pull || abort "failed to update source. do you have local changes?"
 [ -z $1 ] || git checkout $1
+git pull || abort "failed to update source. do you have local changes?"
 s/build || abort "build failed."
 }
 

src/economy.c

@@ -1820,7 +1820,8 @@ int make_cmd(unit * u, struct order *ord)
             cmistake(u, ord, 275, MSG_PRODUCE);
         }
         else {
-            direction_t d = get_direction(getstrtoken(), u->faction->locale);
+            const char * s = getstrtoken();
+            direction_t d = s ? get_direction(s, u->faction->locale) : NODIRECTION;
             if (d != NODIRECTION) {
                 build_road(r, u, m, d);
             }
@@ -2058,6 +2059,7 @@ static void buy(unit * u, request ** buyorders, struct order *ord)
     const item_type *itype = NULL;
     const luxury_type *ltype = NULL;
     keyword_t kwd;
+    const char *s;
 
     if (u->ship && is_guarded(r, u, GUARD_CREWS)) {
         cmistake(u, ord, 69, MSG_INCOME);
@@ -2133,7 +2135,8 @@ static void buy(unit * u, request ** buyorders, struct order *ord)
     /* die Menge der verkauften Güter merken */
     a->data.i += n;
 
-    itype = finditemtype(getstrtoken(), u->faction->locale);
+    s = getstrtoken();
+    itype = s ? finditemtype(s, u->faction->locale) : 0;
     if (itype != NULL) {
         ltype = resource2luxury(itype->rtype);
         if (ltype == NULL) {

src/items.c

@@ -35,16 +35,19 @@ use_studypotion(struct unit *u, const struct item_type *itype, int amount,
 struct order *ord)
 {
     if (init_order(u->thisorder) == K_STUDY) {
-        skill_t sk;
+        skill_t sk = NOSKILL;
-        skill *sv;
+        skill *sv = 0;
+        const char * s = getstrtoken();
 
-        sk = get_skill(getstrtoken(), u->faction->locale);
+        if (s) {
+            sk = get_skill(s, u->faction->locale);
             sv = unit_skill(u, sk);
+        }
 
         if (sv && sv->level > 2) {
             /* TODO: message */
         }
-        else if (study_cost(u, sk) > 0) {
+        else if (sk!=NOSKILL && study_cost(u, sk) > 0) {
             /* TODO: message */
         }
         else {
@@ -54,8 +57,9 @@ struct order *ord)
                 a = a_add(&u->attribs, a_new(&at_learning));
             }
             teach = (teaching_info *)a->data.v;
-            if (amount > MAXGAIN)
+            if (amount > MAXGAIN) {
                 amount = MAXGAIN;
+            }
             teach->value += amount * 30;
             if (teach->value > MAXGAIN * 30) {
                 teach->value = MAXGAIN * 30;

src/kernel/build.c

@@ -90,15 +90,21 @@ ship *getship(const struct region * r)
 
 static void destroy_road(unit * u, int nmax, struct order *ord)
 {
-  direction_t d = get_direction(getstrtoken(), u->faction->locale);
+    const char *s = getstrtoken();
+    direction_t d = s ? get_direction(s, u->faction->locale) : NODIRECTION;
+    if (d == NODIRECTION) {
+        /* Die Richtung wurde nicht erkannt */
+        cmistake(u, ord, 71, MSG_PRODUCE);
+    } else {
         unit *u2;
         region *r = u->region;
-  short n = (short)nmax;
+        short road, n = (short)nmax;
         
-  if (nmax > SHRT_MAX)
+        if (nmax > SHRT_MAX) {
             n = SHRT_MAX;
-  else if (nmax < 0)
+        } else if (nmax < 0) {
             n = 0;
+        }
 
         for (u2 = r->units; u2; u2 = u2->next) {
             if (u2->faction != u->faction && is_guard(u2, GUARD_TAX)
@@ -109,11 +115,7 @@ static void destroy_road(unit * u, int nmax, struct order *ord)
             }
         }
 
-  if (d == NODIRECTION) {
+        road = rroad(r, d);
-    /* Die Richtung wurde nicht erkannt */
-    cmistake(u, ord, 71, MSG_PRODUCE);
-  } else {
-    short road = rroad(r, d);
         n = _min(n, road);
         if (n != 0) {
             region *r2 = rconnect(r, d);

src/kernel/config.c

@@ -1127,7 +1127,8 @@ unsigned int getuint(void)
 
 int getint(void)
 {
-    return atoi(getstrtoken());
+    const char * s = getstrtoken();
+    return s ? atoi(s) : 0;
 }
 
 const struct race *findrace(const char *s, const struct locale *lang)
@@ -1199,7 +1200,8 @@ bool isparam(const char *s, const struct locale * lang, param_t param)
 
 param_t getparam(const struct locale * lang)
 {
-    return findparam(getstrtoken(), lang);
+    const char *s = getstrtoken();
+    return s ? findparam(s, lang) : NOPARAM;
 }
 
 faction *findfaction(int n)

src/laws.c

@@ -2127,9 +2127,10 @@ int mail_cmd(unit * u, struct order *ord)
 int banner_cmd(unit * u, struct order *ord)
 {
     init_order(ord);
+    const char * s = getstrtoken();
 
     free(u->faction->banner);
-    u->faction->banner = _strdup(getstrtoken());
+    u->faction->banner = s ? _strdup(s) : 0;
     add_message(&u->faction->msgs, msg_message("changebanner", "value",
         u->faction->banner));
 

src/study.c

@@ -59,7 +59,8 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 static skill_t getskill(const struct locale *lang)
 {
-    return get_skill(getstrtoken(), lang);
+    const char * s = getstrtoken();
+    return s ? get_skill(s, lang) : NOSKILL;
 }
 
 magic_t getmagicskill(const struct locale * lang)