correct build error when using ESPWifiManualSetup

#529
add a test environment so as to verify this functionnality on [CI]

main/main.ino

@@ -1505,7 +1505,9 @@ if (cmpToMainTopic(topicOri,subjectMQTTtoSYSset))
       }
       else if (strstr(cmd, eraseCmd) != NULL)
       { //erase and restart
+        #ifndef ESPWifiManualSetup
         setup_wifimanager(true);
+        #endif
       }
       else
       {

platformio.ini

@@ -49,6 +49,7 @@ extra_configs =
 ;default_envs = uno-rf
 ;default_envs = uno-fastled
 ;default_envs = atmega-all
+;default_envs = test-manual-wifi
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;                              ENVIRONMENTS PARAMETERS                                 ;
@@ -378,6 +379,20 @@ build_flags =
   '-DGateway_Name="OpenMQTTGateway_ESP8266_RF"'
 board_build.flash_mode = dout
 
+[env:test-manual-wifi]
+platform = ${com.esp8266_platform}
+board = nodemcuv2
+lib_deps =
+  ${com-esp.lib_deps}
+  ${libraries.rc-switch}
+  ${libraries.esp8266_mdns}
+build_flags = 
+  ${com-esp.build_flags}
+  '-DZgatewayRF="RF"'
+  '-DESPWifiManualSetup=true'
+  '-DGateway_Name="OpenMQTTGateway_TEST_MANUAL_WIFI"'
+board_build.flash_mode = dout
+
 [env:rf-wifi-gateway]
 platform = ${com.esp8266_platform}
 board = nodemcuv2