Merge pull request openSUSE#1992 from dmach/git-obs-api-returning-null

Fix 'git-obs api' command when server returns 'null'

Author: dmach

osc/gitea_api/exceptions.py

@@ -20,7 +20,10 @@ def response_to_exception(response: GiteaHTTPResponse, *, context: Optional[dict
     """
     try:
         data = response.json()
-        messages = [data["message"]] + (data.get("errors", None) or [])
+        if data:
+            messages = [data["message"]] + (data.get("errors", None) or [])
+        else:
+            messages = []
     except json.JSONDecodeError:
         messages = [response.data.decode("utf-8")]