mkv.cpp: make gcc happier

modules/demux/mkv.cpp

@@ -1145,7 +1145,7 @@ static void BlockDecode( demux_t *p_demux, KaxBlock *block, mtime_t i_pts,
         {
             p_block->i_length = i_duration * 1000;
         }
-msg_Warn( p_demux, "Sending block %d", p_block );
+
         es_out_Send( p_demux->out, tk->p_es, p_block );
 
         /* use time stamp only for first block */
@@ -3687,4 +3687,4 @@ void virtual_segment_t::Seek( mtime_t i_date, mtime_t i_time_offset )
     }
 
     linked_segments[i]->Seek( i_date, i_time_offset );
-}
\ No newline at end of file
+}