Require libdvdnav > 4.9.0

Anything older will crash a lot.

(cherry picked from commit 9d51e27b52f241f495c171ebfafc35583dd22e11)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

configure.ac

@@ -1699,7 +1699,7 @@ PKG_ENABLE_MODULES_VLC([DVDREAD], [], [dvdread > 4.9.0], [dvdread input module],
 dnl
 dnl libdvdnav plugin
 dnl
-PKG_ENABLE_MODULES_VLC([DVDNAV], [], [dvdnav >= 4.2.1], [DVD with navigation input module (dvdnav)], [auto])
+PKG_ENABLE_MODULES_VLC([DVDNAV], [], [dvdnav > 4.9.0], [DVD with navigation input module (dvdnav)], [auto])
 
 dnl
 dnl  Blu-ray Disc Support with libbluray