(savedir): Work even if directory size is negative; this can

happen with some NFS screwups.

lib/savedir.c

@@ -89,7 +89,8 @@ savedir (const char *dir, off_t name_size)
 
   /* Be sure name_size is at least `1' so there's room for
      the final NUL byte.  */
-  name_size += !name_size;
+  if (name_size <= 0)
+    name_size = 1;
 
   name_space = (char *) malloc (name_size);
   if (name_space == NULL)