NeilBrown: Fix warning about unused variable.

[Martin F. Krafft]

Module: mdadm
Branch: upstream
Commit: 53f50353399f71aef4041b42df845803e7388d12
URL:    http://git.debian.org/?p=pkg-mdadm/mdadm.git;a=commit;h=53f50353399f71aef4041b42df845803e7388d12

Author: NeilBrown <neilb at suse.de>
Date:   Wed Mar  3 10:29:24 2010 +1100

Fix warning about unused variable.

Warning only appears with -O2, but is invalid.

Signed-off-by: NeilBrown <neilb at suse.de>

---

 Grow.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/Grow.c b/Grow.c
index 74b63b6..4dfa344 100644
--- a/Grow.c
+++ b/Grow.c
@@ -1096,7 +1096,10 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
 			/* set them all just in case some old 'new_*' value
 			 * persists from some earlier problem
 			 */
-			int err;
+			int err = err; /* only used if rv==1, and always set if
+					* rv==1, so initialisation not needed,
+					* despite gcc warning
+					*/
 			if (sysfs_set_num(sra, NULL, "chunk_size", nchunk) < 0)
 				rv = 1, err = errno;
 			if (!rv && sysfs_set_num(sra, NULL, "layout", nlayout) < 0)