Fixed bad memory access

src/core/SkValidatingReadBuffer.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 "SkBitmap.h"
 #include "SkErrorInternals.h"
 #include "SkValidatingReadBuffer.h"
@@ skipping 185 matching lines @@
     return readArray(points, size, sizeof(SkPoint));
 }
 
 bool SkValidatingReadBuffer::readScalarArray(SkScalar* values, size_t size) {
     return readArray(values, size, sizeof(SkScalar));
 }
 
 uint32_t SkValidatingReadBuffer::getArrayCount() {
     const size_t inc = sizeof(uint32_t);
     fError = fError || !IsPtrAlign4(fReader.peek()) || !fReader.isAvailable(inc);
-    return *(uint32_t*)fReader.peek();
+    return fError ? 0 : *(uint32_t*)fReader.peek();
 }
 
 void SkValidatingReadBuffer::readBitmap(SkBitmap* bitmap) {
     const int width = this->readInt();
     const int height = this->readInt();
     const size_t length = this->readUInt();
     // A size of zero means the SkBitmap was simply flattened.
     this->validate(length == 0);
     if (fError) {
         return;
@@ skipping 41 matching lines @@
             delete obj;
             obj = NULL;
         }
     } else {
         // we must skip the remaining data
         this->skip(sizeRecorded);
         SkASSERT(false);
     }
     return obj;
 }