Set the horizontal scanline to NULL when the vertical one fails

src/effects/SkBlurMaskFilter.cpp

 
 /*
  * Copyright 2006 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 "SkBlurMaskFilter.h"
 #include "SkBlurMask.h"
@@ skipping 669 matching lines @@
             ada.reset(profile);
         }
 
         SkAutoTMalloc<uint8_t> verticalPixels(height);
         SkBlurMask::ComputeBlurredScanline(verticalPixels, profile, height, sigma);
 
         *verticalScanline = context->createTexture(&params, texDesc, verticalCacheID,
                                                    verticalPixels, 0);
 
         if (NULL == *verticalScanline) {
-            (*horizontalScanline)->unref();
+            SkSafeSetNull(*horizontalScanline);
             return false;
         }
 
     }
     return true;
 }
 
 GrRectBlurEffect::GrRectBlurEffect(const SkRect& rect, float sigma,
                                    GrTexture *horizontal_scanline, GrTexture *vertical_scanline)
   : INHERITED(),
@@ skipping 196 matching lines @@
     } else {
         str->append("None");
     }
     str->append("))");
 }
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkBlurMaskFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurMaskFilterImpl)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END