added so it can be used as empty

src/ei/engine/scene/Sprite.java

@@ -88,6 +88,7 @@ public class Sprite extends Entity {
 	 * Draw the sprite
 	 */
 	public void render() {
+		if(texture != null){
 			// store the current model matrix
 			GL11.glPushMatrix();
 	
@@ -123,6 +124,7 @@ public class Sprite extends Entity {
 			// restore the model view matrix to prevent contamination
 			GL11.glPopMatrix();
 		}
+	}
 	
 	/**
 	 * Returns the bound of this class