ffmpeg source update for sep 09

source/patched-ffmpeg-mt/libavfilter/avfiltergraph.c

 /*
  * filter graphs
  * copyright (c) 2008 Vitor Sessak
  * copyright (c) 2007 Bobby Bingham
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
@@ skipping 115 matching lines @@
         for(j = 0; j < filter->input_count; j ++) {
             AVFilterLink *link = filter->inputs[j];
             if(link && link->in_formats != link->out_formats) {
                 if(!avfilter_merge_formats(link->in_formats,
                                            link->out_formats)) {
                     AVFilterContext *scale;
                     char scale_args[256];
                     /* couldn't merge format lists. auto-insert scale filter */
                     snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
                              scaler_count++);
-                    scale =
-                        avfilter_open(avfilter_get_by_name("scale"),inst_name);
+                    avfilter_open(&scale, avfilter_get_by_name("scale"), inst_name);
 
                     snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts);
                     if(!scale || scale->filter->init(scale, scale_args, NULL) ||
                                  avfilter_insert_filter(link, scale, 0, 0)) {
                         avfilter_destroy(scale);
                         return -1;
                     }
 
                     if (avfilter_graph_add_filter(graph, scale) < 0)
                         return -1;
@@ skipping 48 matching lines @@
     if(query_formats(graph, log_ctx))
         return -1;
 
     /* Once everything is merged, it's possible that we'll still have
      * multiple valid media format choices. We pick the first one. */
     pick_formats(graph);
 
     return 0;
 }