Fix optional argument not being considered in setbattleflag (#6973)

src/map/atcommand.cpp

@@ -7322,7 +7322,7 @@ ACMD_FUNC(setbattleflag)
 	int reload = 0;
 	nullpo_retr(-1, sd);
 
-	if (!message || !*message || sscanf(message, "%127s %127s %11d", flag, value, &reload) != 2) {
+	if (!message || !*message || sscanf(message, "%127s %127s %11d", flag, value, &reload) < 2) {
         	clif_displaymessage(fd, msg_txt(sd,1231)); // Usage: @setbattleflag <flag> <value> {<reload>}
         	return -1;
     	}