nilfs-{clean,resize}: fix duplicate option error output

These commands overlap the error messages output by getopt() or
getopt_long() and the error messages output by themselves when invalid
command line options are specified.

Fix this issue by removing the own error message and printing the
usage instructions instead.

Signed-off-by: Ryusuke Konishi <[email protected]>

Author: konis

sbin/nilfs-clean/nilfs-clean.c

@@ -508,7 +508,7 @@ static void nilfs_clean_parse_options(int argc, char *argv[])
 			show_version_only = 1;
 			break;
 		default:
-			myprintf(_("Error: invalid option -- %c\n"), optopt);
+			nilfs_clean_usage();
 			exit(EXIT_FAILURE);
 		}
 	}

sbin/nilfs-resize/nilfs-resize.c

@@ -1689,7 +1689,7 @@ static void nilfs_resize_parse_options(int argc, char *argv[])
 			show_version_only = 1;
 			break;
 		default:
-			errx("invalid option -- %c", optopt);
+			nilfs_resize_usage();
 			exit(EXIT_FAILURE);
 		}
 	}