Bug 1372467 - Stop at end of line after unknown attribute. r=bwc

MozReview-Commit-ID: 5tg6gKbQfHy

media/webrtc/signaling/src/sdp/sipcc/sdp_attr.c

@@ -1353,7 +1353,12 @@ sdp_result_e sdp_parse_attr_fmtp (sdp_t *sdp_p, sdp_attr_t *attr_p,
             }
           }
         }
+        if (*fmtp_ptr == '\n') {
+          // reached end of line, stop parsing
+          done = TRUE;
+        } else {
           fmtp_ptr++;
+        }
       } else {
           done = TRUE;
       }