Get rid of trailing whitespace.

Commit generated by command:

find -type f ! -path '*.git*' ! -path '*.png' ! -path '*.ico' ! -path \
    '*.ogg' | xargs -I '{}' sed -i '{}' -e 's/\t*$//g' -e 's/ *$//g'

modules/game_interface/widgets/uigamemap.lua

@@ -60,9 +60,9 @@ function UIGameMap:onMouseRelease(mousePosition, mouseButton)
   if not self.allowNextRelease then
     return true
   end
-  
+
   local autoWalkPos = self:getPosition(mousePosition)
-  
+
   -- happens when clicking outside of map boundaries
   if not autoWalkPos then return false end
 
@@ -73,7 +73,7 @@ function UIGameMap:onMouseRelease(mousePosition, mouseButton)
     autoWalkPos.y = autoWalkPos.y + dz
     autoWalkPos.z = localPlayerPos.z
   end
-  
+
   local lookThing
   local useThing
   local creatureThing
@@ -85,8 +85,8 @@ function UIGameMap:onMouseRelease(mousePosition, mouseButton)
     lookThing = tile:getTopLookThing()
     useThing = tile:getTopUseThing()
     creatureThing = tile:getTopCreature()
-  end 
-   
+  end
+
   local autoWalkTile = g_map.getTile(autoWalkPos)
   if autoWalkTile then
     attackCreature = autoWalkTile:getTopCreature()