Bug 1538253 - VPXDecoder::IsCompatible checks subsampling x members for equality. r=jya

We had a stray `&&` where a `==` should have been.

Differential Revision: https://phabricator.services.mozilla.com/D24526

--HG--
extra : moz-landing-system : lando

dom/media/platforms/agnostic/VPXDecoder.h

@@ -108,8 +108,9 @@ class VPXDecoder : public MediaDataDecoder,
 
     bool IsCompatible(const VPXStreamInfo& aOther) const {
       return mImage == aOther.mImage && mProfile == aOther.mProfile &&
-             mBitDepth == aOther.mBitDepth && mSubSampling_x &&
-             aOther.mSubSampling_x && mSubSampling_y == aOther.mSubSampling_y;
+             mBitDepth == aOther.mBitDepth &&
+             mSubSampling_x == aOther.mSubSampling_x &&
+             mSubSampling_y == aOther.mSubSampling_y;
     }
   };