fix signedness/conversion warnings

1 files changed, 1 insertions, 1 deletions

diff --git a/cv/video-widget.cpp b/cv/video-widget.cpp
index 7cc6ca2d..7240814f 100644
--- a/cv/video-widget.cpp
+++ b/cv/video-widget.cpp
@@ -67,7 +67,7 @@ void cv_video_widget::update_image(const cv::Mat& frame)
         frame_color = frame_scaled;
 
     int stride = frame_color->step.p[0], rows = frame_color->rows;
-    int nbytes = rows * stride;
+    unsigned nbytes = (unsigned)(rows * stride);
     vec.resize(nbytes); vec.shrink_to_fit();
     std::memcpy(vec.data(), frame_color->data, nbytes);