fixed datatype in check

Author: s-m-e

qgist/workbench/dtype_fsm.py

@@ -204,7 +204,7 @@ def save_workbench(self, name, mainwindow):
 
     def import_workbench(self, workbench_dict, mainwindow):
 
-        if not isinstance(workbench_dict, str):
+        if not isinstance(workbench_dict, dict):
             raise QgistTypeError(translate('global', '"workbench_dict" must be dict. (dtype_fsm import)'))
         if 'name' not in workbench_dict.keys():
             raise QgistValueError(translate('global', '"workbench_dict" does not contain a name. (dtype_fsm import)'))