added wxRB_SINGLE style as temp workaround for MSW native radiobutton bug

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17575 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/radiobut.tex

@@ -19,6 +19,9 @@ exclusive options. It has a text label next to a (usually) round button.
 \twocolwidtha{5cm}
 \begin{twocollist}\itemsep=0pt
 \twocolitem{\windowstyle{wxRB\_GROUP}}{Marks the beginning of a new group of radio buttons.}
+\twocolitem{\windowstyle{wxRB\_SINGLE}}{If your radio buttons are not
+consecutive siblings, they cannot form a group under Windows and you should use
+this style to indicate that each of them is handled individually.}
 \end{twocollist}
 
 See also \helpref{window styles overview}{windowstyles}.