[PATCH, take 2] libertas: fix "warning: Using plain integer as NULL pointer" sparse warnings

[Holger Schurig]

This fixes three "warning: Using plain integer as NULL pointer"
sparse warnings.

Signed-off-by: Holger Schurig <hs4233 at mail.mn-solutions.de>

--

Used the idea from johill.

Index: libertas-2.6/drivers/net/wireless/libertas/scan.c
===================================================================
--- libertas-2.6.orig/drivers/net/wireless/libertas/scan.c	2007-10-08 12:40:31.000000000 +0200
+++ libertas-2.6/drivers/net/wireless/libertas/scan.c	2007-10-08 13:18:50.000000000 +0200
@@ -578,7 +578,7 @@ static int wlan_scan_channel_list(wlan_p
 
 	lbs_deb_enter(LBS_DEB_ASSOC);
 
-	if (pscancfgout == 0 || pchantlvout == 0 || pscanchanlist == 0) {
+	if (!pscancfgout || !pchantlvout || !pscanchanlist) {
 		lbs_deb_scan("Scan: Null detect: %p, %p, %p\n",
 		       pscancfgout, pchantlvout, pscanchanlist);
 		return -1;