Include wpa_supplicant_i.h to verify function prototype match

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

wpa_supplicant/eap_register.c

@@ -17,6 +17,7 @@
 #include "common.h"
 #include "eap_peer/eap_methods.h"
 #include "eap_server/eap_methods.h"
+#include "wpa_supplicant_i.h"
 
 
 /**