wireless: remove some (bogus?) 'may be used uninitialized' warnings

net/mac80211/tx.c: In function ‘ieee80211_tx_h_select_key’:
net/mac80211/tx.c:448: warning: ‘key’ may be used uninitialized in this function

drivers/net/wireless/ath/ath9k/rc.c: In function ‘ath_rc_rate_getidx’:
drivers/net/wireless/ath/ath9k/rc.c:815: warning: ‘nextindex’ may be used uninitialized in this function

drivers/net/wireless/hostap/hostap_plx.c: In function ‘prism2_plx_probe’:
drivers/net/wireless/hostap/hostap_plx.c:438: warning: ‘cor_index’ may be used uninitialized in this function
drivers/net/wireless/hostap/hostap_plx.c:438: warning: ‘cor_offset’ may be used uninitialized in this function
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/rc.c

@@ -812,7 +812,7 @@ static u8 ath_rc_rate_getidx(struct ath_softc *sc,
 			     u16 min_rate)
 {
 	u32 j;
-	u8 nextindex;
+	u8 nextindex = 0;
 
 	if (min_rate) {
 		for (j = RATE_TABLE_SIZE; j > 0; j--) {

drivers/net/wireless/hostap/hostap_plx.c

@@ -435,7 +435,7 @@ static int prism2_plx_probe(struct pci_dev *pdev,
 	unsigned long pccard_attr_mem;
 	unsigned int pccard_attr_len;
 	void __iomem *attr_mem = NULL;
-	unsigned int cor_offset, cor_index;
+	unsigned int cor_offset = 0, cor_index = 0;
 	u32 reg;
 	local_info_t *local = NULL;
 	struct net_device *dev = NULL;

net/mac80211/tx.c

@@ -445,7 +445,7 @@ ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
 static ieee80211_tx_result debug_noinline
 ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
 {
-	struct ieee80211_key *key;
+	struct ieee80211_key *key = NULL;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;