Added extra hit test style for more accurate reporting

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44329 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/richtextbuffer.tex

@@ -606,6 +606,8 @@ The function returns one of the following values:
 #define wxRICHTEXT_HITTEST_AFTER    0x04
 // The point was on the position returned from HitTest
 #define wxRICHTEXT_HITTEST_ON       0x08
+// The point was on space outside content
+#define wxRICHTEXT_HITTEST_OUTSIDE  0x10
 \end{verbatim}
 }