Switch SkAutoMalloc to SkAutoTMalloc to avoid cast

src/core/SkDraw.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.
  */
 #define __STDC_LIMIT_MACROS
 
 #include "SkDraw.h"
 #include "SkBlitter.h"
@@ skipping 1216 matching lines @@
 
         mask.fFormat = SkMask::kA8_Format;
         mask.fRowBytes = SkAlign4(mask.fBounds.width());
         size_t size = mask.computeImageSize();
         if (0 == size) {
             // the mask is too big to allocated, draw nothing
             return;
         }
 
         // allocate (and clear) our temp buffer to hold the transformed bitmap
-        SkAutoMalloc    storage(size);
-        mask.fImage = (uint8_t*)storage.get();
+        SkAutoTMalloc<uint8_t> storage(size);
+        mask.fImage = storage.get();
         memset(mask.fImage, 0, size);
 
         // now draw our bitmap(src) into mask(dst), transformed by the matrix
         {
             SkBitmap    device;
             device.installPixels(SkImageInfo::MakeA8(mask.fBounds.width(), mask.fBounds.height()),
                                  mask.fImage, mask.fRowBytes);
 
             SkCanvas c(device);
             // need the unclipped top/left for the translate
@@ skipping 831 matching lines @@
         mask->fImage = SkMask::AllocImage(size);
         memset(mask->fImage, 0, mask->computeImageSize());
     }
 
     if (SkMask::kJustComputeBounds_CreateMode != mode) {
         draw_into_mask(*mask, devPath, style);
     }
 
     return true;
 }