Clean up rigctl.c debug output

tests/rigctl.c

@@ -563,7 +563,7 @@ int main(int argc, char *argv[])
 
     if (retcode != RIG_OK)
     {
-        fprintf(stderr, "rig_open: error = %s %s %s \n", rigerror(retcode), rig_file,
+        fprintf(stderr, "rig_open: error = %s %s \n", rig_file,
                 strerror(errno));
 
         if (!ignore_rig_open_error) { exit(2); }