mount/sundries.c: fix indent

Fix the following checkpatch warnings:

 WARNING: please, no spaces at the start of a line
 #41: FILE: mount/sundries.c:41:
 +     char *t;$

 WARNING: please, no spaces at the start of a line
 #43: FILE: mount/sundries.c:43:
 +     if (s == NULL)$

 WARNING: suspect code indent for conditional statements (5, 10)
 #43: FILE: mount/sundries.c:43:
 +     if (s == NULL)
 +         die(EX_SOFTWARE, _("bug in xstrndup call"));

 WARNING: please, no spaces at the start of a line
 #46: FILE: mount/sundries.c:46:
 +     t = xmalloc(n+1);$

 WARNING: please, no spaces at the start of a line
 #47: FILE: mount/sundries.c:47:
 +     strncpy(t, s, n);$

 WARNING: please, no spaces at the start of a line
 #48: FILE: mount/sundries.c:48:
 +     t[n] = 0;$

 WARNING: please, no spaces at the start of a line
 #50: FILE: mount/sundries.c:50:
 +     return t;$
 ...

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
nilfs-utils: add missing space chars

Fix the following checkpatch errors:

 ERROR: spaces required around that '==' (ctx:VxV)
 #219: FILE: mount/mount_opts.c:219:
 +       if (optdata==NULL || *optdata=='\0' || optname==NULL)
                    ^

 ERROR: spaces required around that '==' (ctx:VxV)
 #219: FILE: mount/mount_opts.c:219:
 +       if (optdata==NULL || *optdata=='\0' || optname==NULL)
                                      ^

 ERROR: spaces required around that '==' (ctx:VxV)
 #219: FILE: mount/mount_opts.c:219:
 +       if (optdata==NULL || *optdata=='\0' || optname==NULL)
                                                       ^

 ERROR: spaces required around that '==' (ctx:WxV)
 #223: FILE: mount/mount_opts.c:223:
 +       data = *optdata =='"' ? strip_quotes(optdata) : optdata;
                         ^

 ERROR: spaces required around that '=' (ctx:VxV)
 #328: FILE: mount/mount_opts.c:328:
 +               for (p=opts, opt=NULL; p && *p; p++) {
                       ^

 ERROR: spaces required around that '=' (ctx:VxV)
 #328: FILE: mount/mount_opts.c:328:
 +               for (p=opts, opt=NULL; p && *p; p++) {
                                 ^
 ...

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
nilfs-utils: remove unnecessary externs

Fix the following checkpatch warnings:

 WARNING: externs should be avoided in .c files
 #102: FILE: mkfs/mkfs.c:102:
 +extern char *optarg;

 WARNING: externs should be avoided in .c files
 #103: FILE: mkfs/mkfs.c:103:
 +extern int optind;

 WARNING: externs should be avoided in .c files
 #106: FILE: mount/mount.nilfs2.c:106:
 +extern char *optarg;

 WARNING: externs should be avoided in .c files
 #107: FILE: mount/mount.nilfs2.c:107:
 +extern int optind;

 WARNING: externs should be avoided in .c files
 #104: FILE: mount/umount.nilfs2.c:104:
 +extern char *optarg;

 WARNING: externs should be avoided in .c files
 #105: FILE: mount/umount.nilfs2.c:105:
 +extern int optind;

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>