Added 'Include files' section to class references

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1698 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/metafile.tex

@@ -10,6 +10,10 @@ is to use a wxMetafileDC.
 
 \helpref{wxObject}{wxobject}
 
+\wxheading{Include files}
+
+<wx/metafile.h>
+
 \wxheading{See also}
 
 \helpref{wxMetafileDC}{wxmetafiledc}
@@ -94,6 +98,10 @@ closing your disk-based metafile device context.
 \helpref{wxDC}{wxdc}\\
 \helpref{wxObject}{wxobject}
 
+\wxheading{Include files}
+
+<wx/metafile.h>
+
 \wxheading{See also}
 
 \helpref{wxMetafile}{wxmetafile}, \helpref{wxDC}{wxdc}