fixed wxXmlDocument::Save() to interpret the indentstep argument correctly

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62255 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/xml/xml.cpp

@@ -885,7 +885,7 @@ bool OutputIndentation(wxOutputStream& stream,
                        wxMBConv *convFile)
 {
     wxString str(wxS("\n"));
-    str += wxString(2*indent, wxS(' '));
+    str += wxString(indent, wxS(' '));
     return OutputString(stream, str, convMem, convFile);
 }