don't crash, if the given filename doesn't contain a dot e.g. 'test123'

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@14390 f5534014-38df-0310-8fa8-9805f1628bb7

1 files changed, 1 insertions, 1 deletions

diff --git a/fileset.c b/fileset.c
index c47f7ee44b..362121d20e 100644
--- a/fileset.c
+++ b/fileset.c
@@ -144,7 +144,7 @@ fileset_is_file_in_set(const char *fname1, const char *fname2)
     pfx1 = strrchr(dup_f1, '.');
     pfx2 = strrchr(dup_f2, '.');
 
-    if(strcmp(pfx1, pfx2) != 0) {
+    if(pfx1 == NULL || pfx2 == NULL || strcmp(pfx1, pfx2) != 0) {
         g_free(dup_f1);
         g_free(dup_f2);
         return FALSE;