[hackers] [ubase] No need to have ':' in perror() || sin

[git]

commit f7a4849ded9292fce96bcd3afe7ff63c4834b763
Author: sin <s...@2f30.org>
Date:   Fri Mar 7 14:00:44 2014 +0000

    No need to have ':' in perror()
    
    It gets added automatically.

diff --git a/umount.c b/umount.c
index e98d4b3..9fcc9ba 100644
--- a/umount.c
+++ b/umount.c
@@ -46,7 +46,7 @@ main(int argc, char *argv[])
                        eprintf("setmntent %s:", "/etc/fstab");
                while ((me = getmntent(fp))) {
                        if (umount2(me->mnt_dir, flags) < 0) {
-                               perror("umount2:");
+                               perror("umount2");
                                ret = EXIT_FAILURE;
                        }
                }
@@ -56,7 +56,7 @@ main(int argc, char *argv[])
 
        for (i = 0; i < argc; i++) {
                if (umount2(argv[i], flags) < 0) {
-                       perror("umount2:");
+                       perror("umount2");
                        ret = EXIT_FAILURE;
                }
        }