[FFmpeg-cvslog] tools: fix grammar error

[Moritz Barsnick]

ffmpeg | branch: master | Moritz Barsnick <barsnick at gmx.net> | Sun Oct  9 12:56:58 2016 +0200| [f71c98ee12f9a9e950b4a8fb6b1548fee91ba1f8] | committer: Michael Niedermayer

tools: fix grammar error

Signed-off-by: Moritz Barsnick <barsnick at gmx.net>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f71c98ee12f9a9e950b4a8fb6b1548fee91ba1f8
---

 tools/ismindex.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/ismindex.c b/tools/ismindex.c
index 5917d42..c16e2f2 100644
--- a/tools/ismindex.c
+++ b/tools/ismindex.c
@@ -375,7 +375,7 @@ static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
                                                      track->duration -
                                                      track->offsets[track->chunks - 1].time;
     }
-    // Now try and read the actual durations from the trun sample data.
+    // Now try to read the actual durations from the trun sample data.
     for (i = 0; i < track->chunks; i++) {
         int64_t duration = read_moof_duration(f, track->offsets[i].offset);
         if (duration > 0 && llabs(duration - track->offsets[i].duration) > 3) {