Start cleaning up 64bit Win warnings

https://codereview.chromium.org/27192003/



git-svn-id: http://skia.googlecode.com/svn/trunk@11764 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/utils/SkDeferredCanvas.cpp b/src/utils/SkDeferredCanvas.cpp
index 4509038..ce5eb5e 100644
--- a/src/utils/SkDeferredCanvas.cpp
+++ b/src/utils/SkDeferredCanvas.cpp
@@ -106,7 +106,7 @@
         PipeBlock previousBloc(fBlock, fBytesWritten);
         fBlockList.push(previousBloc);
     }
-    int32_t blockSize = SkMax32(minRequest, kMinBlockSize);
+    size_t blockSize = SkTMax<size_t>(minRequest, kMinBlockSize);
     fBlock = fAllocator.allocThrow(blockSize);
     fBytesWritten = 0;
     *actual = blockSize;