[CIFS] Add support for legacy servers part nine. statfs (df and du) is now

functional, and the length check is fixed so readdir does not throw a
warning message when windows me messes up the response to FindFirst
of an empty dir (with only . and ..).

Signed-off-by: Steve French (sfrench@us.ibm.com)

fs/cifs/netmisc.c

@@ -868,7 +868,7 @@ unsigned int
 smbCalcSize(struct smb_hdr *ptr)
 {
 	return (sizeof (struct smb_hdr) + (2 * ptr->WordCount) +
-		BCC(ptr));
+		2 /* size of the bcc field itself */ + BCC(ptr));
 }
 
 /* The following are taken from fs/ntfs/util.c */