cifs: fix two compiler warning about uninitialized vars

fs/cifs/link.c: In function ‘symlink_hash’:
fs/cifs/link.c:58:3: warning: ‘rc’ may be used uninitialized in this
function [-Wuninitialized]

fs/cifs/smbencrypt.c: In function ‘mdfour’:
fs/cifs/smbencrypt.c:61:3: warning: ‘rc’ may be used uninitialized in this
function [-Wuninitialized]

Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 02cd60a..e8804d3 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -55,8 +55,9 @@
 
 	md5 = crypto_alloc_shash("md5", 0, 0);
 	if (IS_ERR(md5)) {
+		rc = PTR_ERR(md5);
 		cERROR(1, "%s: Crypto md5 allocation error %d\n", __func__, rc);
-		return PTR_ERR(md5);
+		return rc;
 	}
 	size = sizeof(struct shash_desc) + crypto_shash_descsize(md5);
 	sdescmd5 = kmalloc(size, GFP_KERNEL);