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 <[e-mail]>
Cc: Alan Cox <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/char/synclink_gt.c

···
 {
 	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;