two patches/pull requests from janisozaur

- replace our custom bmap with std::map::at()
- compile fixes for editor

lib/mapping/CCampaignHandler.cpp

@@ -453,13 +453,13 @@ const CCampaignScenario & CCampaignState::getCurrentScenario() const
 {
 	return camp->scenarios[currentMap];
 }
-
-ui8 CCampaignState::currentBonusID() const
-{
-	return chosenCampaignBonuses[currentMap];
-}
-
-CCampaignState::CCampaignState()
+
+ui8 CCampaignState::currentBonusID() const
+{
+	return chosenCampaignBonuses.at(currentMap);
+}
+
+CCampaignState::CCampaignState()
 {}
 
 CCampaignState::CCampaignState( unique_ptr<CCampaign> _camp ) : camp(std::move(_camp))