applied wxPerl doc patches

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9748 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/sngchdlg.tex

@@ -69,6 +69,10 @@ Use \helpref{wxSingleChoiceDialog::ShowModal}{wxsinglechoicedialogshowmodal} to
 into a single parameter {\tt choices} which is expected to be a Python
 list of strings.}
 
+\perlnote{In wxPerl there is just an array reference in place of {\tt n}
+and {\tt choices}, and the client data array, if present, must have the
+same length as the choices array.}
+
 \membersection{wxSingleChoiceDialog::\destruct{wxSingleChoiceDialog}}
 
 \func{}{\destruct{wxSingleChoiceDialog}}{\void}