- Fix: Get Item assignement: if no valid gridno is found, let the game find one upon loading the sector instead of risking a wrong gridno assignment

- Fix: When dropping an item in strategic inventory, height values are not set 
- Fix: When looking for a valid gridno to drop items t via strategic inventory, WORLD_ITEM_REACHABLE is not reliable, as updated map topology trumps this. Instead rely upon finding a valid gridno once the sector is entered.
- Fix: when searching for a new item dropoff gridno, search for new height too
- Fix: if items are spawned mid-air, the player cannot retrieve them

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@8136 3b4a5df2-a311-0410-b5c6-a8a6f20db521

TileEngine/overhead map.cpp

@@ -528,8 +528,8 @@ void HandleOverheadMap( )
 				{
 					sActionGridNo = sIntTileGridNo;
 				}
-
-				bZLevel = GetZLevelOfItemPoolGivenStructure( sActionGridNo, 0, pStructure );
+				
+				bZLevel = GetLargestZLevelOfItemPool( pItemPool );
 
 				if ( AnyItemsVisibleOnLevel( pItemPool, bZLevel ) )
 				{