Fix for moving creatures/items far out of reach

Fix to https://github.com/edubart/otclient/issues/1055

modules/game_interface/widgets/uigamemap.lua

@@ -30,16 +30,30 @@ function UIGameMap:onDragLeave(droppedWidget, mousePos)
 end
 
 function UIGameMap:onDrop(widget, mousePos)
-  if not self:canAcceptDrop(widget, mousePos) then return false end
+  if not self:canAcceptDrop(widget, mousePos) then
+    return false
+  end
 
   local tile = self:getTile(mousePos)
-  if not tile then return false end
+  if not tile then
+    return false
+  end
 
   local thing = widget.currentDragThing
-  local toPos = tile:getPosition()
-
   local thingPos = thing:getPosition()
-  if thingPos.x == toPos.x and thingPos.y == toPos.y and thingPos.z == toPos.z then return false end
+  if not thingPos then
+    return false
+  end
+
+  local thingTile = thing:getTile()
+  if thingPos.x ~= 65535 and not thingTile then
+    return false
+  end
+
+  local toPos = tile:getPosition()
+  if thingPos.x == toPos.x and thingPos.y == toPos.y and thingPos.z == toPos.z then
+    return false
+  end
 
   if thing:isItem() and thing:getCount() > 1 then
     modules.game_interface.moveStackableItem(thing, toPos)