Merge pull request 'remove unnecessary output when results are empty' (#28) from feat/empty_find into develop

Reviewed-on: https://www.kuhl-mann.de/git/git/jkuhl/corrlib/pulls/28

corrlib/cli.py

@@ -108,6 +108,8 @@ def find(
     Find a record in the backlog at hand. Through specifying it's ensemble and the measured correlator.
     """
     results = find_record(path, ensemble, corr, code)
+    if results.empty:
+        return
     if arg == 'all':
         print(results)
     else: