Task #7519: constify recvmmsg (for APERTIF)

LCS/Stream/include/Stream/SocketStream.h

@@ -66,7 +66,7 @@ class SocketStream : public FileDescriptorBasedStream
      * Returns the number of messages received if ok, or throws on syscall error
      */
     unsigned recvmmsg( void *bufBase, unsigned maxMsgSize,
-                       std::vector<unsigned> &recvdMsgSizes );
+                       std::vector<unsigned> &recvdMsgSizes ) const;
 
     // Allow individual recv()/send() calls to last for 'timeout' seconds before returning EWOULDBLOCK
     void setTimeout(double timeout);

LCS/Stream/src/SocketStream.cc

@@ -311,7 +311,7 @@ struct mmsghdr {
 #endif
 
 unsigned SocketStream::recvmmsg( void *bufBase, unsigned maxMsgSize,
-                                 std::vector<unsigned> &recvdMsgSizes )
+                                 std::vector<unsigned> &recvdMsgSizes ) const
 {
   ASSERT(protocol == UDP);
   ASSERT(mode == Server);