Merge pull request #97 from cbeck88/location_set_empty

fix logic error in location_set:empty

changelog

@@ -39,6 +39,7 @@ Version 1.11.9+dev:
      flag breaks building.
    * Updated screenshots used inside the ingame help and fixed description of
      orbs.
+   * Fixed bug #21659: lua location_set:empty now works as described 
 
 Version 1.11.9:
  * Add-ons client:

data/lua/location_set.lua

@@ -15,7 +15,7 @@ local methods = {}
 local locset_meta = { __index = methods }
 
 function methods:empty()
-	return next(self.values)
+	return (not next(self.values))
 end
 
 function methods:size()