UdpTransport:IsIpAddressValid: Added extra :: check for ipv6

webrtc/voice_engine/test/channel_transport/udp_transport_impl.cc

 /*
  *  Copyright (c) 2012 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 2857 matching lines @@
             return false;
         }
         if(nDubbleColons > 1)
         {
             return false;
         }
         if(nColons > 7 || nColons < 2)
         {
             return false;
         }
+        if(nColons < 7 && nDubbleColons == 0)
+        {
+          return false;
+        }
         if(!(nDots == 3 || nDots == 0))
         {
             return false;
         }
         lastColonPos = -1;
         int32_t charsBeforeColon = 0;
         for(i = 0; i < nColons; i++)
         {
             charsBeforeColon=colonPos[i]-lastColonPos-1;
             if(charsBeforeColon > 4)
@@ skipping 108 matching lines @@
         if (nDots != 3 || !allUnder256)
         {
             return false;
         }
     }
     return true;
 }
 
 }  // namespace test
 }  // namespace webrtc