* dvblast.c: Fix segfault when no input option is passed.

git-svn-id: svn://svn.videolan.org/dvblast/trunk@97 55d3f8b6-4a41-4d2d-a900-313d1436a5b8

dvblast.c

@@ -608,7 +608,7 @@ int main( int i_argc, char **pp_argv )
             usage();
         }
     }
-    if ( optind < i_argc )
+    if ( optind < i_argc || pf_Open == NULL )
         usage();
 
     msg_Warn( NULL, "restarting" );