[FFmpeg-cvslog] ffmpeg_opt: Constify hwaccel pointer.

[Carl Eugen Hoyos]

ffmpeg | branch: master | Carl Eugen Hoyos <ceffmpeg at gmail.com> | Mon Nov 27 23:54:33 2017 +0100| [ed4a0c7923e8935d1829029a2c7eb980269f8ca3] | committer: Carl Eugen Hoyos

ffmpeg_opt: Constify hwaccel pointer.

Fixes a warning:
fftools/ffmpeg_opt.c:804:29: warning: assignment discards ‘const’ qualifier from pointer target type

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ed4a0c7923e8935d1829029a2c7eb980269f8ca3
---

 fftools/ffmpeg_opt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index 672054223a..a6e36ac822 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -702,7 +702,8 @@ static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
         AVStream *st = ic->streams[i];
         AVCodecParameters *par = st->codecpar;
         InputStream *ist = av_mallocz(sizeof(*ist));
-        char *framerate = NULL, *hwaccel = NULL, *hwaccel_device = NULL;
+        char *framerate = NULL, *hwaccel_device = NULL;
+        const char *hwaccel = NULL;
         char *hwaccel_output_format = NULL;
         char *codec_tag = NULL;
         char *next;