Don't crash when filter_same() gets called on FILTER_ACCEPT or FILTER_REJECT.

diff --git a/filter/filter.c b/filter/filter.c
index 3bb21e682614af87203955a699fc181366419fca..5faabfefa4c2b77615d4035680e032f83f3dec47 100644 (file)
--- a/filter/filter.c
+++ b/filter/filter.c
@@ -557,5 +557,10 @@ filters_postconfig(void)
 int
 filter_same(struct filter *new, struct filter *old)
 {
+  if (old == new)      /* Handle FILTER_ACCEPT and FILTER_REJECT */
+    return 1;
+  if (old == FILTER_ACCEPT || old == FILTER_REJECT ||
+      new == FILTER_ACCEPT || new == FILTER_REJECT)
+    return 0;
   return i_same(new->root, old->root);
 }