UI: Added shift-click support to most slot areas, except crafting.

Also fixed survival inventory's crafting grid not working.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@868 0a769ca7-a7f5-676a-18bf-c427514a06d6

source/Protocol132.cpp

@@ -572,12 +572,13 @@ void cProtocol132::WriteItem(const cItem & a_Item)
 		ItemType = -1;
 	}
 	
-	WriteShort(ItemType);
 	if (a_Item.IsEmpty())
 	{
+		WriteShort(-1);
 		return;
 	}
 	
+	WriteShort(ItemType);
 	WriteByte (a_Item.m_ItemCount);
 	WriteShort(a_Item.m_ItemDamage);