libertas: correct sparse warnings

  CHECK   drivers/net/wireless/libertas/cfg.c
drivers/net/wireless/libertas/cfg.c:493:19: warning: cast to restricted __le16
  CHECK   drivers/net/wireless/libertas/mesh.c
drivers/net/wireless/libertas/mesh.c:577:16: warning: incorrect type in assignment (different base types)
drivers/net/wireless/libertas/mesh.c:577:16:    expected restricted __le32 [addressable] [assigned] [usertype] id
drivers/net/wireless/libertas/mesh.c:577:16:    got bool

Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/cfg.c b/drivers/net/wireless/libertas/cfg.c
index 03b7108..cb3b855 100644
--- a/drivers/net/wireless/libertas/cfg.c
+++ b/drivers/net/wireless/libertas/cfg.c
@@ -479,7 +479,6 @@
 	struct cmd_ds_802_11_scan_rsp *scanresp = (void *)resp;
 	int bsssize;
 	const u8 *pos;
-	u16 nr_sets;
 	const u8 *tsfdesc;
 	int tsfsize;
 	int i;
@@ -488,12 +487,11 @@
 	lbs_deb_enter(LBS_DEB_CFG80211);
 
 	bsssize = get_unaligned_le16(&scanresp->bssdescriptsize);
-	nr_sets = le16_to_cpu(scanresp->nr_sets);
 
 	lbs_deb_scan("scan response: %d BSSs (%d bytes); resp size %d bytes\n",
-			nr_sets, bsssize, le16_to_cpu(resp->size));
+			scanresp->nr_sets, bsssize, le16_to_cpu(resp->size));
 
-	if (nr_sets == 0) {
+	if (scanresp->nr_sets == 0) {
 		ret = 0;
 		goto done;
 	}