jp (blog/edit): avoid call to syntaxConvert if syntax is already XHTML

frontends/src/jp/cmd_blog.py

@@ -367,6 +367,8 @@ class Edit(base.CommandBase, BlogCommon, common.BaseEdit):
         if self.args.syntax is None:
             # default syntax has been used
             mb_data['content_rich'] =  content
+        elif self.current_syntax == SYNTAX_XHTML:
+            mb_data['content_xhtml'] = content
         else:
             mb_data['content_xhtml'] = self.host.bridge.syntaxConvert(content, self.current_syntax, SYNTAX_XHTML, False, self.profile)