--- a/src/ai/ai_squirrel.cpp	Tue Jun 10 19:05:12 2008 +0000
+++ b/src/ai/ai_squirrel.cpp	Tue Jun 10 19:11:30 2008 +0000
@@ -54,7 +54,7 @@
 		}
 		if (sb.st_mode & S_IFREG && !library_dir) {
 			char *ext = strrchr(d_name, '.');
-			if (ext != NULL && strcasecmp(ext, ".tar") != 0) continue;
+			if (ext == NULL || strcasecmp(ext, ".tar") != 0) continue;
 
 			/* Create the full path to the tarfile */
 			char tarname[MAX_PATH];