Merge pull request #472 from ohlordhebacc/mapeditor-lastexplore-shmup-fix

Fix the "lastexplore" value getting set to the turn/knives thrown count instead of "shmup::curtime" when enabling the map editor in shmup, and when playing the fifteen+4 puzzle in shmup

menus.cpp

@@ -331,7 +331,7 @@ EX void showCreative() {
     dialog::cheat_if_confirmed([] {
       cheater++;
       pushScreen(mapeditor::showMapEditor);
-      lastexplore = turncount;
+      lastexplore = shmup::on ? shmup::curtime : turncount;
       addMessage(XLAT("You activate your terraforming powers!"));
       });
     });