Remove unnecessary wpa_ie_len check from wpa_parse_wpa_ie_wpa()

There is no need to have a separate "fail silently" case for wpa_ie_len
== 0. That condition does not seem to be reachable and even if it were,
the following "ie len too short" case will result in the exact same
return value.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/common/wpa_common.c

@@ -727,11 +727,6 @@ int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
 	data->num_pmkid = 0;
 	data->mgmt_group_cipher = 0;
 
-	if (wpa_ie_len == 0) {
-		/* No WPA IE - fail silently */
-		return -1;
-	}
-
 	if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
 		wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
 			   __func__, (unsigned long) wpa_ie_len);