Added a check to msFreeCharArray() to bail if the array itself is NULL.

mapfile.c

@@ -137,10 +137,9 @@ void msFree(void *p)
 void msFreeCharArray(char **array, int num_items)
 {
   int i;
-
+  if(!array) return;
   for(i=0; i<num_items; i++)
     msFree(array[i]);
-
   msFree(array);
 }