Fix libdvdnav dvd name and add additional fallback if no name is found

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6744 b64f7644-9d1e-0410-96f1-a4d463321fa5

contrib/libdvdnav/A01-name.patch

@@ -0,0 +1,10 @@
+--- a/src/vm/vm.c
++++ b/src/vm/vm.c
+@@ -402,6 +402,7 @@
+       /* return 0; Not really used for now.. */
+     }
+     /* ifoRead_TXTDT_MGI(vmgi); Not implemented yet */
++    dvd_read_name(vm->dvd_name, vm->dvd_serial, dvdroot);
+   }
+   if (vm->vmgi) {
+     int i, mask;

libhb/dvdnav.c

@@ -334,6 +334,7 @@ static hb_title_t * hb_dvdnav_title_scan( hb_dvd_t * e, int t, uint64_t min_dura
     uint64_t       duration, longest;
     int            longest_pgcn, longest_pgn, longest_pgcn_end;
     const char   * name;
+    unsigned char  unused[1024];
     const char   * codec_name;
 
     hb_log( "scan: scanning title %d", t );
@@ -344,8 +345,13 @@ static hb_title_t * hb_dvdnav_title_scan( hb_dvd_t * e, int t, uint64_t min_dura
     {
         strncpy( title->name, name, sizeof( title->name ) );
     }
-    else
+
+    if (strlen(title->name) == 0)
     {
+        if( DVDUDFVolumeInfo( d->reader, title->name, sizeof( title->name ),
+                             unused, sizeof( unused ) ) )
+        {
+
         char * p_cur, * p_last = d->path;
         for( p_cur = d->path; *p_cur; p_cur++ )
         {
@@ -358,6 +364,7 @@ static hb_title_t * hb_dvdnav_title_scan( hb_dvd_t * e, int t, uint64_t min_dura
         char *dot_term = strrchr(title->name, '.');
         if (dot_term)
             *dot_term = '\0';
+        }
     }
 
     /* VTS which our title is in */