[CIFS] Fix compiler warnings

Fix some compiler warnings noticed on x64 by me and ppc64 by Shaggy

Signed-off-by: Steve French (sfrench@us.ibm.com)
diff --git a/fs/cifs/asn1.c b/fs/cifs/asn1.c
index e02010d..98539e2 100644
--- a/fs/cifs/asn1.c
+++ b/fs/cifs/asn1.c
@@ -191,7 +191,8 @@
 		   unsigned char **eoc,
 		   unsigned int *cls, unsigned int *con, unsigned int *tag)
 {
-	unsigned int def, len;
+	unsigned int def = 0; 
+	unsigned int len = 0;
 
 	if (!asn1_id_decode(ctx, cls, con, tag))
 		return 0;