tracker/pt: fix build

1 files changed, 1 insertions, 1 deletions

diff --git a/tracker-pt/point_extractor.h b/tracker-pt/point_extractor.h
index 479b6844..ab51762d 100644
--- a/tracker-pt/point_extractor.h
+++ b/tracker-pt/point_extractor.h
@@ -22,7 +22,7 @@ public:
     // dt: time since last call in seconds
     // WARNING: returned reference is valid as long as object
     const std::vector<cv::Vec2f> &extract_points(cv::Mat &frame);
-    int get_n_points() const { QMutexLocker l(&mtx); return points.size(); }
+    int get_n_points() { QMutexLocker l(&mtx); return points.size(); }
     PointExtractor();
     
     settings_pt s;