[FIX]return warning when processing statement files without transactions

module: account_ebics 16.0

account_ebics/__manifest__.py

@@ -3,7 +3,7 @@
 
 {
     "name": "EBICS banking protocol",
-    "version": "16.0.1.7.0",
+    "version": "16.0.1.7.1",
     "license": "LGPL-3",
     "author": "Noviat",
     "website": "https://www.noviat.com/",

account_ebics/models/ebics_file.py

@@ -240,6 +240,13 @@ class EbicsFile(models.Model):
         if statements:
             statements.write({"import_format": file_format})
             statements = self._statement_duplicate_check(res, statements)
+        else:
+            notifications.append(
+                {
+                    "type": "warning",
+                    "message": _("This file doesn't contain any transaction."),
+                }
+            )
         st_cnt = len(statements)
         warning_cnt = error_cnt = 0
         if notifications: