Reduce allowed error on simple conversions

BUG=none
TEST=unittests
Review URL: https://webrtc-codereview.appspot.com/917006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@431 16f28f9a-4ce2-e073-06de-1de4eb20be90

unit_test/compare_test.cc

@@ -290,8 +290,9 @@ TEST_F(libyuvTest, Psnr) {
   EXPECT_GT(err, 48.0);
   EXPECT_LT(err, 49.0);
 
-  for (int i = 0; i < kSrcPlaneSize; ++i)
+  for (int i = 0; i < kSrcPlaneSize; ++i) {
     src_a[i] = i;
+  }
 
   err = CalcFramePsnr(src_a + kSrcStride * b + b, kSrcStride,
                       src_b + kSrcStride * b + b, kSrcStride,
@@ -421,8 +422,9 @@ TEST_F(libyuvTest, Ssim) {
   EXPECT_GT(err, 0.8);
   EXPECT_LT(err, 0.9);
 
-  for (int i = 0; i < kSrcPlaneSize; ++i)
+  for (int i = 0; i < kSrcPlaneSize; ++i) {
     src_a[i] = i;
+  }
 
   err = CalcFrameSsim(src_a + kSrcStride * b + b, kSrcStride,
                       src_b + kSrcStride * b + b, kSrcStride,

unit_test/rotate_argb_test.cc

@@ -85,8 +85,9 @@ static int ARGBTestRotate(int src_width, int src_height,
     for (j = b * 4; j < (dst_width + b) * 4; ++j) {
       int abs_diff = abs(dst_argb_c[(i * dst_stride_argb) + j] -
                          dst_argb_opt[(i * dst_stride_argb) + j]);
-      if (abs_diff > max_diff)
+      if (abs_diff > max_diff) {
         max_diff = abs_diff;
+      }
     }
   }