added round function in renderer

src/me/hammerle/snuviengine/api/Renderer.java

@@ -276,6 +276,11 @@ public final class Renderer
         }
     }
     
+    public float round(float f)
+    {
+        return ((int) (f * scale)) / scale;
+    }
+    
     // -------------------------------------------------------------------------
     // general stuff
     // -------------------------------------------------------------------------