ffmdec: Do not manually free streams on read_header error, this is always

handled by upper layers.
Fixes double-frees (issue 2003).
Instead call ffm_close to ensure rc_eqs are freed also in the error case.

Originally committed as revision 24490 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/ffmdec.c

@@ -252,6 +252,8 @@ static void adjust_write_index(AVFormatContext *s)
 }
 
 
+static int ffm_close(AVFormatContext *s);
+
 static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
 {
     FFMContext *ffm = s->priv_data;
@@ -381,12 +383,7 @@ static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
     ffm->first_packet = 1;
     return 0;
  fail:
-    for(i=0;i<s->nb_streams;i++) {
-        st = s->streams[i];
-        if (st) {
-            av_free(st);
-        }
-    }
+    ffm_close(s);
     return -1;
 }