[PATCH] Warning fix in drivers/macintosh/macio-adb.c

This one fixes another unitialized var warning (which is harmless, but
whatever).
Signed-off-by: Colin Leroy <colin@colino.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/macintosh/macio-adb.c

@@ -202,7 +202,7 @@ static irqreturn_t macio_adb_interrupt(int irq, void *arg,
 				       struct pt_regs *regs)
 {
 	int i, n, err;
-	struct adb_request *req;
+	struct adb_request *req = NULL;
 	unsigned char ibuf[16];
 	int ibuf_len = 0;
 	int complete = 0;