fix segfault in wms error image when no error set

shown in #4266, although unrelated to the underlying issue
MapServer · Apr 6, 2012 · 412a11b · 412a11b
1 parent 45e9f54
commit 412a11b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/maperror.c b/maperror.c
@@ -403,6 +403,9 @@ void msWriteErrorImage(mapObj *map, char *filename, int blank) {
   colorObj labelcolor, labeloutlinecolor, imagecolor, *imagecolorptr=NULL;
   ls.color = &labelcolor;
   ls.outlinecolor = &labeloutlinecolor;
+  if(!errormsg) {
+     errormsg = msStrdup("No error found sorry. This is likely a bug");
+  }
 
   if (map) {
       if( map->width > 0 && map->height > 0 )