Move gtk-based items out of scope of import for cli

svn: r13599

src/plugins/docgen/HtmlDoc.py

@@ -48,7 +48,6 @@ import const
 from gen.plug.docgen import BaseDoc, TextDoc, FONT_SANS_SERIF
 from libhtmlbackend import HtmlBackend
 from libhtml import Html
-from QuestionDialog import WarningDialog
 
 #------------------------------------------------------------------------
 #
@@ -261,6 +260,7 @@ class HtmlDoc(BaseDoc, TextDoc):
         if from_fname != dest:
             shutil.copyfile(from_fname, dest)
         elif self.warn_dir:
+            from QuestionDialog import WarningDialog
             WarningDialog(
                 _("Possible destination error") + "\n" +
                 _("You appear to have set your target directory "