importers: defend against parsers returning None (#13335)

Author: valentijnscholten

dojo/importers/default_importer.py

@@ -108,7 +108,7 @@ def process_scan(
         parser = self.get_parser()
         # Get the findings from the parser based on what methods the parser supplies
         # This could either mean traditional file parsing, or API pull parsing
-        parsed_findings = self.parse_findings(scan, parser)
+        parsed_findings = self.parse_findings(scan, parser) or []
         # process the findings in the foreground or background
         new_findings = self.determine_process_method(parsed_findings, **kwargs)
         # Close any old findings in the processed list if the the user specified for that

dojo/importers/default_reimporter.py

@@ -93,7 +93,7 @@ def process_scan(
         parser = self.get_parser()
         # Get the findings from the parser based on what methods the parser supplies
         # This could either mean traditional file parsing, or API pull parsing
-        parsed_findings = self.parse_findings(scan, parser)
+        parsed_findings = self.parse_findings(scan, parser) or []
         # process the findings in the foreground or background
         (
             new_findings,