Escape unreadable dirs we are already into

We care about the directory we are going to, so there is no reason
to get locked inside there if the parent is readable.

noice.c

@@ -689,11 +689,12 @@ nochange:
 			    strcmp(path, ".") == 0 ||
 			    strchr(path, '/') == NULL)
 				goto nochange;
-			if (canopendir(path) == 0) {
+			dir = xdirname(path);
+			if (canopendir(dir) == 0) {
+				free(dir);
 				printwarn();
 				goto nochange;
 			}
-			dir = xdirname(path);
 			/* Save history */
 			oldpath = path;
 			path = dir;