wpa_ielen was declared u32 when we actually use an int

Fix sparse (-Wtypesign) issues:
drivers/staging/rtl8188eu/core/rtw_ieee80211.c:1008:60: warning:
incorrect type in argument 2 (different signedness)
drivers/staging/rtl8188eu/core/rtw_ieee80211.c:1008:60:    expected int
*wpa_ie_len
drivers/staging/rtl8188eu/core/rtw_ieee80211.c:1008:60:    got unsigned
int *<noident>
drivers/staging/rtl8188eu/core/rtw_ieee80211.c:1021:69: warning:
incorrect type in argument 2 (different signedness)

Signed-off-by: Pierre-Yves Kerbrat <pkerb...@free.fr>
---
 drivers/staging/rtl8188eu/core/rtw_ieee80211.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_ieee80211.c 
b/drivers/staging/rtl8188eu/core/rtw_ieee80211.c
index 3e7a1767607e..b074de5e93f8 100644
--- a/drivers/staging/rtl8188eu/core/rtw_ieee80211.c
+++ b/drivers/staging/rtl8188eu/core/rtw_ieee80211.c
@@ -1000,7 +1000,7 @@ int ieee80211_get_hdrlen(u16 fc)
 
 static int rtw_get_cipher_info(struct wlan_network *pnetwork)
 {
-       u32 wpa_ielen;
+       int wpa_ielen;
        unsigned char *pbuf;
        int group_cipher = 0, pairwise_cipher = 0, is8021x = 0;
        int ret = _FAIL;
-- 
2.11.0

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