--- a/src/group_cmd.cpp Wed May 23 13:52:10 2007 +0000
+++ b/src/group_cmd.cpp Wed May 23 14:02:10 2007 +0000
@@ -205,8 +205,10 @@
if (!IsValidVehicleID(p2) || (!IsValidGroupID(new_g) && !IsDefaultGroupID(new_g))) return CMD_ERROR;
- Group *g = GetGroup(new_g);
- if (g->owner != _current_player) return CMD_ERROR;
+ if (IsValidGroupID(new_g)) {
+ Group *g = GetGroup(new_g);
+ if (g->owner != _current_player) return CMD_ERROR;
+ }
Vehicle *v = GetVehicle(p2);
if (v->owner != _current_player || (v->type == VEH_TRAIN && !IsFrontEngine(v))) return CMD_ERROR;