apply XRCID() automatically to XRCSIZERITEM() argument (patch 1798697)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48836 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/txrc.tex

@@ -520,7 +520,7 @@ The code can then access the sizer item by using {\tt XRCSIZERITEM} and
 {\tt XRCID} together.
 
 \begin{verbatim}
-wxSizerItem* item = XRCSIZERITEM(*this, XRCID("area"));
+wxSizerItem* item = XRCSIZERITEM(*this, "area");
 \end{verbatim}
 
 \subsection{Adding new resource handlers}\label{newresourcehandlers}