dvdnav: fix crash when poorly masterd disc has no menus

Mac The Ripper, when in "Main Feature Extraction" mode, likes to create
an image with no menus, but leaves navigation commands in place that jump
to the non-existing menu.  libdvdnav doesn't like this much.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@2877 b64f7644-9d1e-0410-96f1-a4d463321fa5

diff --git a/contrib/libdvdnav/A06-null-pgcit.patch b/contrib/libdvdnav/A06-null-pgcit.patch
new file mode 100644 (file)
index 0000000..8456b64
--- /dev/null
+++ b/contrib/libdvdnav/A06-null-pgcit.patch
@@ -0,0 +1,17 @@
+diff -Naur libdvdnav.orig/src/vm/vm.c libdvdnav/src/vm/vm.c
+--- libdvdnav.orig/src/vm/vm.c 2009-03-13 18:28:22.000000000 -0700
++++ libdvdnav/src/vm/vm.c      2009-10-11 17:49:17.813221643 -0700
+@@ -1866,6 +1866,13 @@
+   default:
+     abort();
+   }
++  // get_MENU_PGCIT fails if h->pgci_ut == NULL.
++  // this happens with badly mastered discs.  Mac The Ripper happens
++  // to create such discs when in "Main Feature Extraction" mode.
++  if(pgcit == NULL && vm->vtsi != NULL) {
++    (vm->state).domain = VTS_DOMAIN;
++    pgcit = vm->vtsi->vts_pgcit;
++  }
+ 
+   return pgcit;
+ }