removed extra (non existing) Prepend() parameter

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18331 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/menu.tex

@@ -479,13 +479,14 @@ TRUE if the menu item is enabled, FALSE otherwise.
 
 \membersection{wxMenu::Prepend}\label{wxmenuprepend}
 
-\func{bool}{Prepend}{\param{size\_t }{pos}, \param{wxMenuItem *}{item}}
+\func{bool}{Prepend}{\param{wxMenuItem *}{item}}
 
 \func{void}{Prepend}{\param{int}{ id},\rtfsp
 \param{const wxString\& }{ item}, \param{const wxString\& }{helpString = ""},\rtfsp
 \param{wxItemKind}{ kind = wxITEM\_NORMAL}}
 
-Inserts the given {\it item} at the position $0$.
+Inserts the given {\it item} at the position $0$, i.e. before all the other
+existing items.
 
 \wxheading{See also}