document that GetAttribute's argument must not be NULL

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48930 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/docs/latex/wx/xmlnode.tex b/docs/latex/wx/xmlnode.tex
index 342474454d03b2bee33992c76d5167e89b8b5433..6ca3a5ee49d5990f76862eb1798c093f202463ea 100644 (file)
--- a/docs/latex/wx/xmlnode.tex
+++ b/docs/latex/wx/xmlnode.tex
@@ -207,7 +207,8 @@ Returns a pointer to the parent of this node or \NULL if this node has no parent
 \constfunc{bool}{GetAttribute}{\param{const wxString\& }{attrName}, \param{wxString* }{value}}
 
 Returns \true if a attribute named {\it attrName} could be found.
-If the {\it value} pointer is not \NULL, the value of that attribute is saved there.
+The value of that attribute is saved in \arg{value} (which
+must not be \NULL).
 
 \constfunc{wxString}{GetAttribute}{\param{const wxString\& }{attrName}, \param{const wxString\& }{defaultVal}}