Fix some potential segfaults.

Commited in SoC by Bobby Bingham on 2007-07-30 15:53:33

Originally committed as revision 12088 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavfilter/avfilter.h

@@ -184,7 +184,10 @@ struct AVFilterContext
 
     char *name;
 
+    unsigned input_count;
     AVFilterLink **inputs;
+
+    unsigned output_count;
     AVFilterLink **outputs;
 
     void *priv;