Hamfisted fix to drawLooper w/ 0 stages bug

src/core/SkDrawLooper.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDrawLooper.h"
 #include "SkCanvas.h"
 #include "SkMatrix.h"
@@ skipping 17 matching lines @@
             break;
         }
     }
     return true;
 }
 
 void SkDrawLooper::computeFastBounds(const SkPaint& paint, const SkRect& src,
                                      SkRect* dst) {
     SkCanvas canvas;
 
+    *dst = src;
     this->init(&canvas);
     for (bool firstTime = true;; firstTime = false) {
         SkPaint p(paint);
         if (this->next(&canvas, &p)) {
             SkRect r(src);
 
             p.setLooper(NULL);
             p.computeFastBounds(r, &r);
             canvas.getTotalMatrix().mapRect(&r);
 
             if (firstTime) {
                 *dst = r;
             } else {
                 dst->join(r);
             }
         } else {
             break;
         }
     }
 }