Fix syntax error in packager

boards/vcu128/dth/firmware/hdl/memory_blocks/packager.vhd

@@ -24,7 +24,7 @@ entity packager is
         orbits_per_packet       : in  unsigned(15 downto 0);
         orbits_per_chunk        : in  std_logic_vector(19 downto 0);
         wait_for_oc1            : in  std_logic;
-        crc_err_flag            : in  std_logic := 0; -- TODO: default value is temporary (to avoid compilation errors in other projects not using it)
+        crc_err_flag            : in  std_logic := '0'; -- TODO: default value is temporary (to avoid compilation errors in other projects not using it)
 
         d                       : in  adata(NSTREAMS -1 downto 0);
         d_ctrl                  : in  acontrol;