[FFmpeg-cvslog] lavc/svq3: Do not write into memory defined as const.

[Carl Eugen Hoyos]

ffmpeg | branch: master | Carl Eugen Hoyos <ceffmpeg at gmail.com> | Thu Jan 18 23:31:48 2018 +0100| [55bdee7b07262a07d7c63475b1952b4ec17503d0] | committer: Carl Eugen Hoyos

lavc/svq3: Do not write into memory defined as const.

Fixes a warning on ppc:
libavcodec/svq3.c:1055:21: warning: passing argument 1 of ‘av_write_bswap32’ discards 'const' qualifier from pointer target type

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=55bdee7b07262a07d7c63475b1952b4ec17503d0
---

 libavcodec/svq3.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index a937b2f951..fc17081ecf 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -1048,12 +1048,12 @@ static int svq3_decode_slice_header(AVCodecContext *avctx)
         }
         memcpy(s->slice_buf, s->gb.buffer + s->gb.index / 8, slice_bytes);
 
-        init_get_bits(&s->gb_slice, s->slice_buf, slice_bits);
-
         if (s->watermark_key) {
-            uint32_t header = AV_RL32(&s->gb_slice.buffer[1]);
-            AV_WL32(&s->gb_slice.buffer[1], header ^ s->watermark_key);
+            uint32_t header = AV_RL32(&s->slice_buf[1]);
+            AV_WL32(&s->slice_buf[1], header ^ s->watermark_key);
         }
+        init_get_bits(&s->gb_slice, s->slice_buf, slice_bits);
+
         if (length > 0) {
             memmove(s->slice_buf, &s->slice_buf[slice_length], length - 1);
         }