Config file is not always positioning window 
Hey, just found a small bug with window positioning when using config vars.

If i put my code like so, then it centers both axis.
config.x=-1;
config.y=0;
or
config.x=0;
config.y=-1;

But if i put it like so, then window is in top left corner.
config.x=0;
config.y=0;

diff --git a/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java b/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java
index cf5c18d8b..2c0af30a1 100644
--- a/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java
+++ b/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java
@@ -152,10 +152,8 @@ public class LwjglGraphics implements Graphics {
 		Display.setInitialBackground(config.initialBackgroundColor.r, config.initialBackgroundColor.g,
 			config.initialBackgroundColor.b);
 
-		if (config.x != -1 && config.y != -1) Display.setLocation(config.x, config.y);
+		Display.setLocation(config.x, config.y);
 		createDisplayPixelFormat();
-		config.x = Display.getX();
-		config.y = Display.getY();
 		initiateGLInstances();
 	}
 

['backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java']