Use sdp_info_ro := c_sdp_info_rst default, to avoid Quartus Warning (16788):...

Use sdp_info_ro := c_sdp_info_rst default, to avoid Quartus Warning (16788): Net sdp_info_ro.station_id[15] does not have a driver at sdp_info.vhd(67)

applications/lofar2/libraries/sdp/src/vhdl/sdp_info.vhd

@@ -64,7 +64,7 @@ END sdp_info;
 
 ARCHITECTURE str OF sdp_info IS
 
-  SIGNAL sdp_info_ro: t_sdp_info;  -- ro = read only
+  SIGNAL sdp_info_ro: t_sdp_info := c_sdp_info_rst;  -- ro = read only
   SIGNAL block_period: STD_LOGIC_VECTOR(15 DOWNTO 0);
 
 BEGIN