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Fix crash when seeking to previous keyframe with no keyframes loaded

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Originally committed to SVN as r6305.
This commit is contained in:
Thomas Goyne 2012-01-18 20:08:16 +00:00
parent 9ac2f93bf0
commit 8cf71ddd8d
1 changed files with 7 additions and 2 deletions
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9
aegisub/src/command/video.cpp
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@ -451,9 +451,14 @@ struct video_frame_prev_keyframe : public validator_video_loaded {
STR_HELP("Seek to the previous keyframe.")
void operator()(agi::Context *c) {
int frame = c->videoController->GetFrameN();
std::vector<int> const& kf = c->videoController->GetKeyFrames();
std::vector<int>::const_iterator pos = lower_bound(kf.begin(), kf.end(), frame);
if (kf.empty()) {
c->videoController->JumpToFrame(0);
return;
}
std::vector<int>::const_iterator pos =
lower_bound(kf.begin(), kf.end(), c->videoController->GetFrameN());
if (pos != kf.begin())
--pos;