[QUAD] Bug: Fix Tv Paint get_current_workfile when no scene is opened

openpype/hosts/tvpaint/api/pipeline.py

@@ -160,7 +160,15 @@ def work_root(self, session):
  return session["AVALON_WORKDIR"]
 
  def get_current_workfile(self):
- return execute_george("tv_GetProjectName")
+ # tvPaint return a '\' character when no scene is currently
+ # opened instead of a None value, which causes interferences
+ # in OpenPype's core code.
+ # So we check the returned value and send None if this
+ # character is retrieved.
+ current_workfile = execute_george("tv_GetProjectName")
+ if current_workfile == '\\':
+ current_workfile = None
+ return current_workfile
 
  def workfile_has_unsaved_changes(self):
  return None