[PATCH] Fix warning in pc300_tty driver.

..caused by my last patch to this file.
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/net/wan/pc300_tty.c

@@ -760,7 +760,7 @@ void cpc_tty_receive(pc300dev_t *pc300dev)
 	int rx_len, rx_aux; 
 	volatile unsigned char status; 
 	unsigned short first_bd = pc300chan->rx_first_bd;
-	st_cpc_rx_buf	*new;
+	st_cpc_rx_buf	*new=NULL;
 	unsigned char dsr_rx;
 
 	if (pc300dev->cpc_tty == NULL) {