SkBlurImageFilter returns input when sigma = 0

include/effects/SkBlurImageFilter.h

Index: include/effects/SkBlurImageFilter.h
diff --git a/include/effects/SkBlurImageFilter.h b/include/effects/SkBlurImageFilter.h
index 7f62634a9eb9b6d58bcc2c72c85d5dae2c2bc527..c3549ee8c75c786a0735adc242104dc41fb45aa2 100644
--- a/include/effects/SkBlurImageFilter.h
+++ b/include/effects/SkBlurImageFilter.h
@@ -15,6 +15,8 @@ class SK_API SkBlurImageFilter : public SkImageFilter {
 public:
     static SkImageFilter* Create(SkScalar sigmaX, SkScalar sigmaY, SkImageFilter* input = NULL,
                                  const CropRect* cropRect = NULL) {
+        if ((0 == sigmaX) && (0 == sigmaY) && (nullptr == cropRect))

[Stephen White, 2015/12/10 16:20:18]

*braces* are mandatory {}; parentheses () are not. :)

[xidachen, 2015/12/10 16:23:30]

Oops, fixed in PS#6.

+            return input;
         return new SkBlurImageFilter(sigmaX, sigmaY, input, cropRect);
     }