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/gamelib/player.lua

@@ -154,7 +154,7 @@ function Player:hasState(_state, states)
   for i = 1, 32 do
     local pow = math.pow(2, i-1)
     if pow > states then break end
-    
+
     local states = bit32.band(states, pow)
     if states == _state then
       return true