Fix:core:Check for nullpointer before remove refcounts in map_destroy

git-svn-id: https://navit.svn.sourceforge.net/svnroot/navit/trunk@4460 ffa7fe5e-494d-0410-b361-a75ebd5db220

diff --git a/navit/navit/map.c b/navit/navit/map.c
index d8ca5e3..94df1e9 100644 (file)
--- a/navit/navit/map.c
+++ b/navit/navit/map.c
@@ -276,6 +276,9 @@ map_destroy_do(struct map *m)
 void
 map_destroy(struct map *m)
 {
+       if (!m)
+               return;
+
        if(0<m->refcount) {
                m->refcount--;
        }