free race prefixes when the game is done (small memory leak).

src/kernel/config.c

@@ -74,6 +74,7 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #include <util/xml.h>
 
 #include "donations.h"
+#include "prefix.h"
 
 #ifdef USE_LIBXML2
 /* libxml includes */
@@ -1767,6 +1768,7 @@ void free_gamedata(void)
     free_units();
     free_regions();
     free_borders();
+    free_prefixes();
 
     for (i = 0; i != MAXLOCALES; ++i) {
         if (defaults[i]) {

src/prefix.c

@@ -19,3 +19,14 @@ void add_raceprefix(const char *prefix)
     race_prefixes[next++] = _strdup(prefix);
     race_prefixes[next] = NULL;
 }
+
+void free_prefixes(void) {
+    int i;
+    if (race_prefixes) {
+        for (i = 0; race_prefixes[i]; ++i) {
+            free(race_prefixes[i]);
+        }
+        free(race_prefixes);
+        race_prefixes = 0;
+    }
+}

src/prefix.h

@@ -8,7 +8,8 @@ extern "C" {
 #endif
 
     void add_raceprefix(const char *);
-    char **race_prefixes;
+    char **race_prefixes; // zero-terminated array of valid prefixes
+    void free_prefixes(void);
 
 #ifdef __cplusplus
 }