RTCStats operator== bugfix

webrtc/api/stats/rtcstats.h

 /*
  *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 253 matching lines @@
   Type type() const override { return kType; }
   bool is_sequence() const override;
   bool is_string() const override;
   bool operator==(const RTCStatsMemberInterface& other) const override {
     if (type() != other.type())
       return false;
     const RTCStatsMember<T>& other_t =
         static_cast<const RTCStatsMember<T>&>(other);
     if (!is_defined_)
       return !other_t.is_defined();
+    if (!other.is_defined())
+      return false;
     return value_ == other_t.value_;
   }
   std::string ValueToString() const override;
 
   // Assignment operators.
   T& operator=(const T& value) {
     value_ = value;
     is_defined_ = true;
     return value_;
   }
@@ skipping 29 matching lines @@
     return &value_;
   }
 
  private:
   T value_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_STATS_RTCSTATS_H_