Check for null before logging in ShadowCanvas. (src is allowed to be null)
Merge branch 'bug_shadow_canvas' of git://github.com/theelfismike/robolectric into theelfismike-bug_shadow_canvas

* 'bug_shadow_canvas' of git://github.com/theelfismike/robolectric:
  Check for null before logging in ShadowCanvas. (src is allowed to be null)

Conflicts:
	src/main/java/com/xtremelabs/robolectric/shadows/ShadowCanvas.java