Merge commit '67f2a688'

* commit '67f2a688':
  avconv: remove a write-only variable

Conflicts:
	ffmpeg.c
	ffmpeg.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

ffmpeg.c

@@ -2156,7 +2156,6 @@ static int init_input_stream(int ist_index, char *error, int error_len)
 
     ist->next_pts = AV_NOPTS_VALUE;
     ist->next_dts = AV_NOPTS_VALUE;
-    ist->is_start = 1;
 
     return 0;
 }

ffmpeg.h

@@ -255,7 +255,6 @@ typedef struct InputStream {
     int64_t filter_in_rescale_delta_last;
 
     double ts_scale;
-    int is_start;            /* is 1 at the start and after a discontinuity */
     int saw_first_ts;
     int showed_multi_packet_warning;
     AVDictionary *opts;