From 4d1ce95be98866d08f4b8ab8db389a5d45215cbd Mon Sep 17 00:00:00 2001
From: Marc Jeanmougin <marc@jeanmougin.fr>
Date: Tue, 17 Sep 2019 00:18:52 +0200
Subject: Actually fix overflow

---
 src/trace/autotrace/inkscape-autotrace.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'src/trace')

diff --git a/src/trace/autotrace/inkscape-autotrace.cpp b/src/trace/autotrace/inkscape-autotrace.cpp
index 58abe8c61..156a7b3cd 100644
--- a/src/trace/autotrace/inkscape-autotrace.cpp
+++ b/src/trace/autotrace/inkscape-autotrace.cpp
@@ -60,12 +60,12 @@ static guchar* to_3channels(GdkPixbuf* input) {
     int rs = gdk_pixbuf_get_rowstride (input);
     for(int row=0;row<gdk_pixbuf_get_height(input);row++) {
         for (int col=0;col<gdk_pixbuf_get_width(input);col++) {
-            char alpha = *(pix + row * rs + col * 4 + 3);
-            char white = 255 - alpha;
+            guchar alpha = *(pix + row * rs + col * 4 + 3);
+            guchar white = 255 - alpha;
             for(int chan=0;chan<3;chan++) {
                 guchar *pnew = (pix + row * rs + col * 3 + chan);
                 guchar *pold = (pix + row * rs + col * 4 + chan);
-                out[x++] = (char)(((int)(*pold) * (int)alpha / 256) + white);
+                out[x++] = (guchar)(((int)(*pold) * (int)alpha / 256) + white);
             }
         }
     }
-- 
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