drivers/char/synclink_gt.c: don't return an uninitialised local

drivers/char/synclink_gt.c: In function 'put_char':
drivers/char/synclink_gt.c:919: warning: 'ret' may be used uninitialized in this function

The compiler speaketh truth.

Cc: Paul Fulghum <paulkf@microgate.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/char/synclink_gt.c

@@ -916,7 +916,7 @@ static int put_char(struct tty_struct *tty, unsigned char ch)
 {
 	struct slgt_info *info = tty->driver_data;
 	unsigned long flags;
-	int ret;
+	int ret = 0;
 
 	if (sanity_check(info, tty->name, "put_char"))
 		return 0;