Canvas: Calculate height based on command presence anyway.

zb3 left some comments stating that games check this before adding
any commands. But from what i've seen on this source, calculating
height based on commands instead of being fullscreen or not makes
games that do use commands scale better. Case in point, Crash
Bandicoot and City Race, although Munkiki's Castles is also improved
by not starting with a small white bar at the bottom.

src/javax/microedition/lcdui/Canvas.java

@@ -240,15 +240,7 @@ protected void sizeChanged(int w, int h)
 	public void notifySetCurrent() { _invalidate(); }
 
 	@Override
-	public int getHeight() 
-	{ 
-		/* 
-		 * zb3: this is quite problematic because games check this before adding commands
-		 * so if we'd only include the bar if there are commands, games could
-		 * get invalid resolution 
-		 */
-		return fullscreen ? height : height - barHeight;
-	}
+	public int getHeight() { return commands.isEmpty() ? height : height - barHeight; }
 
 	private void paintCommandsBar() 
 	{