From eab77deddaedd6a1d3c44eebfab71c9c129a005a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marcin=20=C5=9Alusarz?= <marcin.slusarz@gmail.com>
Date: Fri, 2 Oct 2020 20:18:18 +0200
Subject: [PATCH] Fix crash when drawing histogram.

Manifests as:
terminate called after throwing an instance of 'cv::Exception'
  what():  OpenCV(4.2.0) ../modules/imgproc/src/drawing.cpp:1811: error: (-215:Assertion failed) 0 < thickness && thickness <= MAX_THICKNESS in function 'line'
---
 src/image_handlers/frontend/histLib.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/image_handlers/frontend/histLib.cpp b/src/image_handlers/frontend/histLib.cpp
index 20d5780..c101744 100755
--- a/src/image_handlers/frontend/histLib.cpp
+++ b/src/image_handlers/frontend/histLib.cpp
@@ -441,7 +441,7 @@ void CHistLib::DrawHistBar(Mat& HistImage, unsigned BinCount)
       mHistImageBorder + mSpread * BinCount,
       mHistImageBorder + mHistImageHeight),
     mHistAxisColor,
-    0);
+    1);
 
   // Label initial bin
   putText(