Define 'filelist' for dgus/origin

Marlin/src/lcd/extui/lib/dgus/origin/DGUSDisplayDef.h

@@ -30,17 +30,17 @@ enum DGUSLCD_Screens : uint8_t {
   DGUSLCD_SCREEN_STATUS              = 30,
   DGUSLCD_SCREEN_STATUS2             = 32,
   DGUSLCD_SCREEN_MANUALMOVE          = 40,
-  DGUSLCD_SCREEN_MANUALEXTRUDE=42,
+  DGUSLCD_SCREEN_MANUALEXTRUDE       = 42,
   DGUSLCD_SCREEN_FANANDFEEDRATE      = 44,
   DGUSLCD_SCREEN_FLOWRATES           = 46,
   DGUSLCD_SCREEN_SDFILELIST          = 50,
   DGUSLCD_SCREEN_SDPRINTMANIPULATION = 52,
   DGUSLCD_SCREEN_POWER_LOSS          = 100,
-  DGUSLCD_SCREEN_PREHEAT=120,
+  DGUSLCD_SCREEN_PREHEAT             = 120,
-  DGUSLCD_SCREEN_UTILITY=110,
+  DGUSLCD_SCREEN_UTILITY             = 110,
-  DGUSLCD_SCREEN_FILAMENT_HEATING=146,
+  DGUSLCD_SCREEN_FILAMENT_HEATING    = 146,
-  DGUSLCD_SCREEN_FILAMENT_LOADING=148,
+  DGUSLCD_SCREEN_FILAMENT_LOADING    = 148,
-  DGUSLCD_SCREEN_FILAMENT_UNLOADING=158,
+  DGUSLCD_SCREEN_FILAMENT_UNLOADING  = 158,
   DGUSLCD_SCREEN_SDPRINTTUNE         = 170,
   DGUSLCD_SCREEN_CONFIRM             = 240,
   DGUSLCD_SCREEN_KILL                = 250, ///< Kill Screen. Must always be 250 (to be able to display "Error wrong LCD Version")

Marlin/src/lcd/extui/lib/dgus/origin/DGUSScreenHandler.cpp

@@ -42,6 +42,8 @@
 
 #if ENABLED(SDSUPPORT)
 
+  static ExtUI::FileList filelist;
+
   void DGUSScreenHandler::DGUSLCD_SD_FileSelected(DGUS_VP_Variable &var, void *val_ptr) {
     uint16_t touched_nr = (int16_t)swap16(*(uint16_t*)val_ptr) + top_file;
     if (touched_nr > filelist.count()) return;