Fixed a few places where uninitialized memory could have been read

src/core/SkImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImageFilter.h"
 
 #include "SkBitmap.h"
@@ skipping 43 matching lines @@
 SkImageFilter::SkImageFilter(int inputCount, SkFlattenableReadBuffer& buffer) {
     fInputCount = buffer.readInt();
     if (buffer.validate((fInputCount >= 0) && ((inputCount < 0) || (fInputCount == inputCount)))) {
         fInputs = new SkImageFilter*[fInputCount];
         for (int i = 0; i < fInputCount; i++) {
             if (buffer.readBool()) {
                 fInputs[i] = buffer.readImageFilter();
             } else {
                 fInputs[i] = NULL;
             }
+            if (!buffer.isValid()) {
+                fInputCount = i; // Do not use fInputs past that point in the destructor
+                break;
+            }
         }
         SkRect rect;
         buffer.readRect(&rect);
-        if (buffer.validate(SkIsValidRect(rect))) {
+        if (buffer.isValid() && buffer.validate(SkIsValidRect(rect))) {
             uint32_t flags = buffer.readUInt();
             fCropRect = CropRect(rect, flags);
         }
     } else {
         fInputCount = 0;
         fInputs = NULL;
     }
 }
 
 void SkImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
@@ skipping 107 matching lines @@
     return true;
 }
 
 bool SkImageFilter::asNewEffect(GrEffectRef**, GrTexture*, const SkMatrix&, const SkIRect&) const {
     return false;
 }
 
 bool SkImageFilter::asColorFilter(SkColorFilter**) const {
     return false;
 }