Fix handling of setMatrix in debugger

https://codereview.appspot.com/7349047/



git-svn-id: http://skia.googlecode.com/svn/trunk@7785 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/debugger/SkDrawCommand.h b/debugger/SkDrawCommand.h
index fba5a01..c0c59e6 100644
--- a/debugger/SkDrawCommand.h
+++ b/debugger/SkDrawCommand.h
@@ -391,7 +391,7 @@
     SetMatrix(const SkMatrix& matrix);
     virtual void execute(SkCanvas* canvas) SK_OVERRIDE;
 private:
-    const SkMatrix* fMatrix;
+    SkMatrix fMatrix;
 };
 
 class Skew : public SkDrawCommand {