debugger: Update the picture view when the first command is selected

debugger/SkDebugger.h

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SKDEBUGGER_H_
 #define SKDEBUGGER_H_
 
 #include "SkDebugCanvas.h"
 #include "SkPicture.h"
 #include "SkTArray.h"
 
 class SkString;
 
 class SkDebugger {
 public:
     SkDebugger();
 
     ~SkDebugger();
 
     void setIndex(int index) {
         fIndex = index;
     }
     void draw(SkCanvas* canvas) {
-        if (fIndex > 0) {
+        if (fIndex >= 0) {
             fDebugCanvas->drawTo(canvas, fIndex);
         }
     }
 
     void step();
     void stepBack();
     void play();
     void rewind();
 
     bool isCommandVisible(int index) {
@@ skipping 86 matching lines @@
 
 private:
     SkDebugCanvas* fDebugCanvas;
     SkPicture* fPicture;
 
     int fIndex;
 };
 
 
 #endif /* SKDEBUGGER_H_ */