typos due to much cut-and-paste: colour -> font in the docs and comment

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13763 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/fontdlg.h

@@ -15,7 +15,8 @@
 #   include "wx/os2/fontdlg.h"
 #endif
 
-// get the colour from user and return it
+// get the font from user and return it, returns wxNullFont if the dialog was
+// cancelled
 wxFont WXDLLEXPORT
 wxGetFontFromUser(wxWindow *parent = (wxWindow *)NULL,
                   const wxFont& fontInit = wxNullFont);