--- a/signs.c Tue May 17 19:08:27 2005 +0000
+++ b/signs.c Tue May 17 19:36:36 2005 +0000
@@ -136,9 +136,11 @@
*/
int32 CmdRenameSign(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
- /* If _cmd_text != 0 means the new text for the sign is non-empty.
+ if (!IsSignIndex(p1)) return CMD_ERROR;
+
+ /* If _cmd_text 0 means the new text for the sign is non-empty.
* So rename the sign. If it is empty, it has no name, so delete it */
- if (_cmd_text != NULL) {
+ if (_cmd_text[0] != '\0') {
/* Create the name */
StringID str = AllocateName(_cmd_text, 0);
if (str == 0) return CMD_ERROR;