hostapd: fix segfault in wpa_supplicant ubus

When introducing ubus reload support, ubus initialization was moved
to the service level instead of being carried out when adding a BSS
configuration. While this works when using wpa_supplicant in that way,
it breaks the ability to run wpa_supplicant on the command line, eg.
for debugging purposes.
Fix that by re-introducing ubus context intialization when adding
configuration.

Reported-by: @PolynomialDivision https://github.com/openwrt/openwrt/pull/2417
Fixes: 60fb4c92b6 ("hostapd: add ubus reload")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>

package/network/services/hostapd/Makefile

@@ -7,7 +7,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=hostapd
-PKG_RELEASE:=7
+PKG_RELEASE:=8
 
 PKG_SOURCE_URL:=http://w1.fi/hostap.git
 PKG_SOURCE_PROTO:=git

package/network/services/hostapd/src/wpa_supplicant/ubus.c

@@ -181,6 +181,8 @@ void wpas_ubus_add_bss(struct wpa_supplicant *wpa_s)
 	char *name;
 	int ret;
 
+	if (!wpas_ubus_init())
+		return;
 
 	if (asprintf(&name, "wpa_supplicant.%s", wpa_s->ifname) < 0)
 		return;