App Server: Move empty destructor to header.

src/servers/app/stackandtile/StackAndTile.cpp

@@ -780,9 +780,3 @@ WindowIterator::_ReverseRewind()
 	if (fCurrentArea)
 		fWindowIndex = fCurrentArea->LayerOrder().CountItems() - 1;
 }
-
-
-SATSnappingBehaviour::~SATSnappingBehaviour()
-{
-
-}

src/servers/app/stackandtile/StackAndTile.h

@@ -157,7 +157,7 @@ private:
 
 class SATSnappingBehaviour {
 public:
-	virtual						~SATSnappingBehaviour();
+	virtual						~SATSnappingBehaviour() {};
 
 	/*! Find all window candidates which possibly can join the group. Found
 	candidates are marked here visual. */