[bug] Wireless interface connected to a network interface not shown

[nemesifier]

Describe the bug
When having a wireless interface connected to a virtual or ethernet interface, one of the wireless interface is not generated.

I suspect this is a regression introduced in #298.

Steps To Reproduce

This bug should affect only the latest master. This patch provides a failing test:

diff --git a/tests/openwrt/test_wireless.py b/tests/openwrt/test_wireless.py
index 0943dc3..ccf2ad4 100644
--- a/tests/openwrt/test_wireless.py
+++ b/tests/openwrt/test_wireless.py
@@ -1167,3 +1167,106 @@ config wifi-iface 'wifi_wlan1'
     def test_parse_wireless_only(self):
         o = OpenWrt(native=self._wireless_only_uci)
         self.assertDictEqual(o.config, self._wireless_only_netjson)
+
+    _wpa_eap_sta = {
+        "interfaces": [
+            {
+                "wireless": {
+                    "network": [
+                        "wwan"
+                    ],
+                    "mode": "station",
+                    "radio": "radio1",
+                    "ack_distance": 0,
+                    "rts_threshold": 0,
+                    "frag_threshold": 0,
+                    "ssid": "SSID",
+                    "bssid": "",
+                    "wds": False,
+                    "encryption": {
+                        "cipher": "auto",
+                        "ieee80211w": "1",
+                        "protocol": "wpa2_enterprise",
+                        "eap_type": "ttls",
+                        "auth": "PAP",
+                        "identity": "username",
+                        "password": "password123",
+                        "ca_cert": "",
+                        "client_cert": "",
+                        "priv_key": "",
+                        "priv_key_pwd": ""
+                    }
+                },
+                "type": "wireless",
+                "name": "wwan",
+                "mtu": 1500,
+                "disabled": False,
+                "network": "",
+                "mac": "00:11:22:33:44:55",
+                "autostart": True,
+                "addresses": []
+            },
+            {
+                "type": "virtual",
+                "name": "wwan",
+                "network": "wwan",
+                "addresses": [
+                    {
+                        "proto": "dhcp",
+                        "family": "ipv4"
+                    }
+                ]
+            }
+        ]
+    }
+    _wireless_eap_uci = """package network
+
+config interface 'wwan'
+    option ifname 'wwan'
+    option proto 'dhcp'
+
+package wireless
+
+config wifi-iface 'wifi_wlan0'
+    option device 'radio0'
+    option ifname 'wlan0'
+    option mode 'ap'
+    option network 'vlan10'
+    option ssid 'WifiVLAN10'
+
+config wifi-iface 'wifi_wlan1'
+    option device 'radio0'
+    option ifname 'wlan1'
+    option mode 'ap'
+    option network 'vlan20'
+    option ssid 'WifiVLAN20'
+
+config wifi-iface 'wifi_wwan'
+    option auth 'PAP'
+    option device 'radio1'
+    option disabled '0'
+    option eap_type 'ttls'
+    option encryption 'wpa2'
+    option identity 'username'
+    option ieee80211w '1'
+    option ifname 'wwan'
+    option macaddr '00:11:22:33:44:55'
+    option mode 'sta'
+    option network 'wwan'
+    option password 'password123'
+    option ssid 'SSID'
+    option wds '0'
+"""
+
+    def test_render_wireless_wpa_eap(self):
+        templates = [self._wireless_only_netjson, self._wpa_eap_sta]
+        o = OpenWrt({}, templates=templates)
+        # print(o.render())
+        # print(OpenWrt(self._wpa_eap_sta).render())
+        # print(OpenWrt(self._wpa_eap_sta, templates=[self._wireless_only_netjson]).render())
+        expected = self._tabs(self._wireless_eap_uci)
+        self.assertEqual(o.render(), expected)
+
+    # def test_parse_wireless_wpa_eap(self):
+    #     o = OpenWrt(native=self._wireless_only_uci)
+    #     self.assertDictEqual(o.config, self._wireless_only_netjson)