Merge pull request #47 from bertsky/fix-v3-regression

relax self.parameter assertion (frozendict!=dict)

Author: kba

src/ocrd_page_to_alto/ocrd_processor.py

@@ -22,7 +22,7 @@ def process_page_file(self, *input_files: Optional[OcrdFileType]) -> None:
         input_file = input_files[0]
         assert input_file
         assert input_file.local_filename
-        assert isinstance(self.parameter, dict)
+        assert self.parameter
         assert input_file.mimetype == MIMETYPE_PAGE
         self.logger.debug("converting file %s", input_file.local_filename)
         converter = OcrdPageAltoConverter(