added Engine::getTextSize()

git-svn-id: svn://anubis/anaglym/trunk@164 99a6e188-d820-4881-8870-2d33a10e2619

tests/cratestack.lua

@@ -44,5 +44,5 @@ function mouse_moves(x, y, xrel, yrel)
 end
 
 function update_overlay_event()
-    ag.drawText("Hi there everyone!", 1, 0.7, 0, 16, 40, 40)
+    ag.drawText("Hi there everyone!", 1, 0.7, 0, 16, 0, 0)
 end