Update wxWidgets version requirements

configure.ac

@@ -58,7 +58,7 @@ esac
 
 # checks for wx
 AM_OPTIONS_WXCONFIG
-reqwx=2.4.0
+reqwx=2.9.0
 AM_PATH_WXCONFIG($reqwx, wxWin=1)
 if test "$wxWin" != 1; then
 	AC_MSG_ERROR([