mdadm.c:fix compile warning "mdfd is uninitialized"

Initialized the mdfd as -1 to prevent compile error
of some compilers.
For example, gcc version 4.8.5(SUSE Linux).

Signed-off-by: Zhilong Liu <zlliu@suse.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/mdadm.c b/mdadm.c
index 001ff684..41dae1db 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -1916,7 +1916,7 @@ static int misc_list(struct mddev_dev *devlist,
 	int rv = 0;
 
 	for (dv = devlist; dv; dv = (rv & 16) ? NULL : dv->next) {
-		int mdfd;
+		int mdfd = -1;
 
 		switch(dv->disposition) {
 		case 'D':