Fix issue when WiFi.begin(ssid, pass) is called right after WiFi.mode(WIFI_OFF)

If ssid and pass matched the values in flash, wifi_station_connect was not called and no connection was attempted

Author: igrr

libraries/ESP8266WiFi/src/ESP8266WiFiSTA.cpp

@@ -134,26 +134,28 @@ wl_status_t ESP8266WiFiSTAClass::begin(const char* ssid, const char *passphrase,
     wifi_station_get_config(&current_conf);
     if(sta_config_equal(current_conf, conf)) {
         DEBUGV("sta config unchanged");
-        return status();
     }
+    else {
+        ETS_UART_INTR_DISABLE();
 
-    ETS_UART_INTR_DISABLE();
+        if(WiFi._persistent) {
+            // workaround for #1997: make sure the value of ap_number is updated and written to flash
+            // to be removed after SDK update
+            wifi_station_ap_number_set(2);
+            wifi_station_ap_number_set(1);
 
-    if(WiFi._persistent) {
-        // workaround for #1997: make sure the value of ap_number is updated and written to flash
-        // to be removed after SDK update
-        wifi_station_ap_number_set(2);
-        wifi_station_ap_number_set(1);
+            wifi_station_set_config(&conf);
+        } else {
+            wifi_station_set_config_current(&conf);
+        }
 
-        wifi_station_set_config(&conf);
-    } else {
-        wifi_station_set_config_current(&conf);
+        ETS_UART_INTR_ENABLE();
     }
 
+    ETS_UART_INTR_DISABLE();
     if(connect) {
         wifi_station_connect();
     }
-
     ETS_UART_INTR_ENABLE();
 
     if(channel > 0 && channel <= 13) {