Fix minor bugs

lib/mapObjects/CGHeroInstance.cpp

@@ -1479,7 +1479,10 @@ void CGHeroInstance::serializeCommonOptions(JsonSerializeFormat & handler)
 			if(portrait >= 0)
 			{
 				if(portrait < legacyHeroes || portrait >= moddedStart)
-					handler.serializeId<si32, si32, HeroTypeID>("portrait", portrait, -1);
+				{
+					int tempPortrait = portrait - GameConstants::HERO_PORTRAIT_SHIFT;
+					handler.serializeId<si32, si32, HeroTypeID>("portrait", tempPortrait, -1);
+				}
 				else
 					handler.serializeInt("portrait", portrait, -1);
 			}
@@ -1489,7 +1492,10 @@ void CGHeroInstance::serializeCommonOptions(JsonSerializeFormat & handler)
 			const JsonNode & portraitNode = handler.getCurrent()["portrait"];
 
 			if(portraitNode.getType() == JsonNode::JsonType::DATA_STRING)
+			{
 				handler.serializeId<si32, si32, HeroTypeID>("portrait", portrait, -1);
+				portrait += GameConstants::HERO_PORTRAIT_SHIFT;
+			}
 			else
 				handler.serializeInt("portrait", portrait, -1);
 		}

lib/mapping/CCampaignHandler.cpp

@@ -264,7 +264,7 @@ CCampaignScenario CCampaignHandler::readScenarioFromJson(JsonNode & reader)
 	CCampaignScenario ret;
 	ret.conquered = false;
 	ret.mapName = reader["map"].String();
-	for(auto & g : reader["precoditions"].Vector())
+	for(auto & g : reader["preconditions"].Vector())
 		ret.preconditionRegions.insert(g.Integer());
 
 	ret.regionColor = reader["color"].Integer();

mapeditor/mapcontroller.cpp

@@ -576,6 +576,9 @@ ModCompatibilityInfo MapController::modAssessmentMap(const CMap & map)
 	ModCompatibilityInfo result;
 	for(auto obj : map.objects)
 	{
+		if(obj->ID == Obj::HERO)
+			continue; //stub! 
+		
 		auto handler = VLC->objtypeh->getHandlerFor(obj->ID, obj->subID);
 		auto modName = QString::fromStdString(handler->getJsonKey()).split(":").at(0).toStdString();
 		if(modName != "core")