Fixed bg_get_data script command (#3921)

* In some cases the command didn't return the members ID for 'type 1'

src/map/script.cpp

@@ -19637,28 +19637,29 @@ BUILDIN_FUNC(bg_updatescore)
 
 BUILDIN_FUNC(bg_get_data)
 {
-	struct battleground_data *bg;
-	int bg_id = script_getnum(st,2),
-		type = script_getnum(st,3), i;
+	struct battleground_data *bg = bg_team_search( script_getnum(st, 2) );
 
-	if( (bg = bg_team_search(bg_id)) == NULL )
-	{
-		script_pushint(st,0);
+	if (bg == NULL) {
+		script_pushint(st, 0);
 		return SCRIPT_CMD_SUCCESS;
 	}
+	int i, j, type = script_getnum(st, 3);
 
-	switch( type )
-	{
-		case 0: script_pushint(st, bg->count); break;
-		case 1:
-			for (i = 0; bg->members[i].sd != NULL; i++)
-				mapreg_setreg(reference_uid(add_str("$@arenamembers"), i), bg->members[i].sd->bl.id);
-			mapreg_setreg(add_str("$@arenamemberscount"), i);
-			script_pushint(st, i);
-			break;
-		default:
-			ShowError("script:bg_get_data: unknown data identifier %d\n", type);
-			break;
+	switch( type ) {
+	case 0:
+		script_pushint(st, bg->count);
+		break;
+	case 1:
+		for (i = 0, j = 0; i < ARRAYLENGTH(bg->members); i++) {
+			if (bg->members[i].sd != NULL)
+				mapreg_setreg(reference_uid(add_str("$@arenamembers"), j++), bg->members[i].sd->bl.id);
+		}
+		mapreg_setreg(add_str("$@arenamemberscount"), j);
+		script_pushint(st, j);
+		break;
+	default:
+		ShowError("script:bg_get_data: unknown data identifier %d\n", type);
+		break;
 	}
 
 	return SCRIPT_CMD_SUCCESS;