Fix problem with empty areas (#772)

* Fixes for obstacles and treasures

lib/rmg/ObjectManager.cpp

@@ -135,6 +135,7 @@ rmg::Path ObjectManager::placeAndConnectObject(const rmg::Area & searchArea, rmg
 		{
 			auto & guardedArea = obj.instances().back()->getAccessibleArea();
 			accessibleArea.intersect(guardedArea);
+			accessibleArea.add(obj.instances().back()->getPosition(true));
 		}
 		
 		auto path = zone.searchPath(accessibleArea, onlyStraight, [&obj, isGuarded](const int3 & t)
@@ -145,6 +146,10 @@ rmg::Path ObjectManager::placeAndConnectObject(const rmg::Area & searchArea, rmg
 				auto & unguardedArea = obj.getAccessibleArea(isGuarded);
 				if(unguardedArea.contains(t) && !guardedArea.contains(t))
 					return false;
+				
+				//guard position is always target
+				if(obj.instances().back()->getPosition(true) == t)
+					return true;
 			}
 			return !obj.getArea().contains(t);
 		});

lib/rmg/ObstaclePlacer.cpp

@@ -88,7 +88,10 @@ void ObstaclePlacer::process()
 			if(!possibleObstacles[i].first)
 				continue;
 			
-			for(auto & temp : possibleObstacles[i].second)
+			auto shuffledObstacles = possibleObstacles[i].second;
+			RandomGeneratorUtil::randomShuffle(shuffledObstacles, generator.rand);
+			
+			for(auto & temp : shuffledObstacles)
 			{
 				auto handler = VLC->objtypeh->getHandlerFor(temp.id, temp.subid);
 				auto obj = handler->create(temp);

lib/rmg/TreasurePlacer.cpp

@@ -722,7 +722,7 @@ void TreasurePlacer::createTreasures(ObjectManager & manager)
 					if(areaToBlock.overlap(zone.freePaths()) || areaToBlock.overlap(manager.getVisitableArea()))
 						return -1.f;
 					
-					return 1.f;
+					return ti.getNearestObjectDistance();
 				}, guarded, false, false);
 			}
 			else