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: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c
index a13668b..8f3cf10 100644
--- a/drivers/net/wireless/ath/ath9k/rc.c
+++ b/drivers/net/wireless/ath/ath9k/rc.c
@@ -812,7 +812,7 @@
 			     u16 min_rate)
 {
 	u32 j;
-	u8 nextindex;
+	u8 nextindex = 0;
 
 	if (min_rate) {
 		for (j = RATE_TABLE_SIZE; j > 0; j--) {
diff --git a/drivers/net/wireless/hostap/hostap_plx.c b/drivers/net/wireless/hostap/hostap_plx.c
index cbf15d7..0e5d510 100644
--- a/drivers/net/wireless/hostap/hostap_plx.c
+++ b/drivers/net/wireless/hostap/hostap_plx.c
@@ -435,7 +435,7 @@
 	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;