Subcall overflow error message

Marlin/src/lcd/language/language_en.h

@@ -52,6 +52,7 @@ namespace Language_en {
   PROGMEM Language_Str MSG_MEDIA_READ_ERROR                = _UxGT("Media read error");
   PROGMEM Language_Str MSG_MEDIA_USB_REMOVED               = _UxGT("USB device removed");
   PROGMEM Language_Str MSG_MEDIA_USB_FAILED                = _UxGT("USB start failed");
+  PROGMEM Language_Str MSG_KILL_SUBCALL_OVERFLOW           = _UxGT("Subcall Overflow");
   PROGMEM Language_Str MSG_LCD_ENDSTOPS                    = _UxGT("Endstops"); // Max length 8 characters
   PROGMEM Language_Str MSG_LCD_SOFT_ENDSTOPS               = _UxGT("Soft Endstops");
   PROGMEM Language_Str MSG_MAIN                            = _UxGT("Main");

Marlin/src/sd/cardreader.cpp

@@ -520,7 +520,7 @@ void CardReader::openFileRead(char * const path, const uint8_t subcall_type/*=0*
       // Too deep? The firmware has to bail.
       if (file_subcall_ctr > SD_PROCEDURE_DEPTH - 1) {
         SERIAL_ERROR_MSG("Exceeded max SUBROUTINE depth:" STRINGIFY(SD_PROCEDURE_DEPTH));
-        kill();
+        kill(GET_TEXT(MSG_KILL_SUBCALL_OVERFLOW));
         return;
       }