[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