[PATCH] ln: alloc pointer variables could be deleted initialized, it first allocates memory

[Li kunyu]

The alloc pointer variable does not need to be initialized and assigned
NULL, it has allocated memory before use, which seems to reduce a mov
instruction.

Signed-off-by: Li kunyu <kunyu@nfschina.com>
---
 src/ln.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/ln.c b/src/ln.c
index bb4695853..cf5d69a64 100644
--- a/src/ln.c
+++ b/src/ln.c
@@ -352,17 +352,17 @@ do_link (char const *source, int destdir_fd, char const 
*dest_base,
           if (backup_base)
             {
               char *backup = backup_base;
-              void *alloc = NULL;
+              void *alloc;
               ptrdiff_t destdirlen = dest_base - dest;
               if (0 < destdirlen)
                 {
                   alloc = xmalloc (destdirlen + strlen (backup_base) + 1);
                   backup = memcpy (alloc, dest, destdirlen);
                   strcpy (backup + destdirlen, backup_base);
+                 free (alloc);
                 }
               quoted_backup = quoteaf_n (2, backup);
               backup_sep = " ~ ";
-              free (alloc);
             }
           printf ("%s%s%s %c> %s\n", quoted_backup, backup_sep,
                   quoteaf_n (0, dest), symbolic_link ? '-' : '=',
-- 
2.18.2