Beats ICS/GN crash fixup (r10)

beats-r10-ics.patch

Index: src/com/beatsportable/beats/GUIGame.java
===================================================================
--- src/com/beatsportable/beats/GUIGame.java	(revision 10)
+++ src/com/beatsportable/beats/GUIGame.java	(working copy)
@@ -571,7 +571,8 @@
 			}
 			
 			// Just in case
-			if (h == null) {
+			// GN (4.0.4) tends to reach here with null canvas (kinda race condition?)
+			if (h == null || canvas == null) {
 				super.onDraw(canvas);
 				return;
 			}