Fix VS build warnings in blend_a64_mask_test.cc

Change-Id: Id4c764198549a60d98e5c4a74083972b97da5b81

test/blend_a64_mask_test.cc

@@ -99,16 +99,16 @@ class BlendA64MaskTest : public FunctionEquivalenceTest<F> {
 
   T dst_ref_[kBufSize];
   T dst_tst_[kBufSize];
-  size_t dst_stride_;
-  size_t dst_offset_;
+  uint32_t dst_stride_;
+  uint32_t dst_offset_;
 
   T src0_[kBufSize];
-  size_t src0_stride_;
-  size_t src0_offset_;
+  uint32_t src0_stride_;
+  uint32_t src0_offset_;
 
   T src1_[kBufSize];
-  size_t src1_stride_;
-  size_t src1_offset_;
+  uint32_t src1_stride_;
+  uint32_t src1_offset_;
 
   uint8_t mask_[kMaxMaskSize];
   size_t mask_stride_;
@@ -116,8 +116,8 @@ class BlendA64MaskTest : public FunctionEquivalenceTest<F> {
   int w_;
   int h_;
 
-  bool suby_;
-  bool subx_;
+  int suby_;
+  int subx_;
 };
 
 //////////////////////////////////////////////////////////////////////////////