[rtp_rtcp] Lint errors cleaned from rtp_utility

R=åsapersson
BUG=webrtc:5277

Review URL: https://codereview.webrtc.org/1539423003

Cr-Commit-Position: refs/heads/master@{#11131}

webrtc/modules/rtp_rtcp/source/rtp_header_parser.cc

@@ -58,7 +58,7 @@ bool RtpHeaderParserImpl::Parse(const uint8_t* packet,
     rtp_header_extension_map_.GetCopy(&map);
   }
 
-  const bool valid_rtpheader = rtp_parser.Parse(*header, &map);
+  const bool valid_rtpheader = rtp_parser.Parse(header, &map);
   if (!valid_rtpheader) {
     return false;
   }