Don't fail if we can't create startup file

Fixes https://gitlab.com/kicad/code/kicad/issues/9205

scripting/kicad_pyshell/__init__.py

@@ -49,7 +49,8 @@ class KiCadPyShell(KiCadEditorNotebookFrame):
 
         # Check if startup script exists
         if not os.path.isfile(self.startup_file):
-            # Not, so create a default.
+            # Not, so try to create a default.
+            try:
                 default_startup = open(self.startup_file, 'w')
                 # provide the content for the default startup file.
                 default_startup.write(
@@ -64,6 +65,8 @@ class KiCadPyShell(KiCadEditorNotebookFrame):
                     "# board = pcbnew.GetBoard()\n" +
                     "# sch = eeschema.GetSchematic()\n")
                 default_startup.close()
+            except:
+                pass
 
     def _setup(self):
         """