fix line/column calculation for JSON Errors.

+ start building a test for http://bugs.eressea.de/view.php?id=1692

src/bind_config.c

@@ -36,8 +36,9 @@ int config_parse(const char *json)
         int line;
         char buffer[10];
         const char *xp = json, *lp, *ep = cJSON_GetErrorPtr();
-        for (line=0,lp=xp;xp && xp<ep;++line,lp=xp+1) {
+        for (line=1,lp=xp;xp && xp<ep;++line,lp=xp+1) {
             xp = strchr(lp, '\n');
+            if (xp>=ep) break;
         }
         xp = (ep > json + 10) ? ep - 10 : json; 
         strncpy(buffer, xp, sizeof(buffer));

src/kernel/config.c

@@ -1170,7 +1170,10 @@ param_t findparam(const char *s, const struct locale * lang)
         const void * match;
         void **tokens = get_translations(lang, UT_PARAMS);
         critbit_tree *cb = (critbit_tree *)*tokens;
-    if (cb_find_prefix(cb, str, strlen(str), &match, 1, 0)) {
+        if (!cb) {
+            log_error_n("no parameters defined in locale %s", locale_name(lang));
+        }
+        else if (cb_find_prefix(cb, str, strlen(str), &match, 1, 0)) {
             cb_get_kv(match, &i, sizeof(int));
             result = (param_t)i;
         }

tests/init.lua

@@ -7,3 +7,4 @@ require "tests.ships"
 require "tests.study"
 require "tests.movement"
 require "tests.castles"
+require "tests.spells"

tests/spells.lua

@@ -0,0 +1,47 @@
+require "lunit"
+
+module("tests.spells", package.seeall, lunit.testcase)
+
+function setup()
+    eressea.game.reset()
+    eressea.settings.set("nmr.removenewbie", "0")
+    eressea.settings.set("nmr.timeout", "0")
+    conf = [[{
+        "races": {
+            "human" : {}
+        },
+        "terrains" : {
+            "plain": { "flags" : [ "land", "walk", "sail" ] }
+        },
+        "spells" : {
+            "resist_magic" : {
+                "index" : 97,
+                "parameters" : "u+"
+            }
+        },
+        "keywords" : {
+            "de" : {
+                "cast" : "ZAUBERE"
+            }
+        },
+        "strings" : {
+            "de" : {
+                "harbour" : "Hafen"
+            }
+        }
+    }]]
+
+    eressea.config.reset()
+    assert(eressea.config.parse(conf)==0)
+end
+
+function test_antimagic_visibility()
+    local r = region.create(0, 0, "plain")
+    local f1 = faction.create("test@example.com", "human", "de")
+    local mage = unit.create(f1, r, 1)
+    local target = unit.create(f1, r, 1)
+    mage:set_skill("magic", 10)
+    mage:add_spell("resist_magic")
+    mage:add_order("ZAUBERE Antimagie " .. target.id)
+    process_orders()
+end