File ImageMagick-CVE-2020-25666.patch of Package ImageMagick.30956

Index: ImageMagick-6.8.8-1/magick/histogram.c
===================================================================
--- ImageMagick-6.8.8-1.orig/magick/histogram.c	2013-12-22 02:50:17.000000000 +0100
+++ ImageMagick-6.8.8-1/magick/histogram.c	2020-12-08 13:25:50.628401534 +0100
@@ -1102,12 +1102,12 @@ static int HistogramCompare(const void *
   color_1=(const ColorPacket *) x;
   color_2=(const ColorPacket *) y;
   if (color_2->pixel.red != color_1->pixel.red)
-    return((int) color_1->pixel.red-(int) color_2->pixel.red);
+    return((int) ((ssize_t) color_1->pixel.red-(ssize_t) color_2->pixel.red));
   if (color_2->pixel.green != color_1->pixel.green)
-    return((int) color_1->pixel.green-(int) color_2->pixel.green);
+    return((int) ((ssize_t) color_1->pixel.green-(ssize_t) color_2->pixel.green));
   if (color_2->pixel.blue != color_1->pixel.blue)
-    return((int) color_1->pixel.blue-(int) color_2->pixel.blue);
-  return((int) color_2->count-(int) color_1->count);
+    return((int) ((ssize_t) color_1->pixel.blue-(ssize_t) color_2->pixel.blue));
+  return((int) ((ssize_t) color_2->count-(ssize_t) color_1->count));
 }
 
 #if defined(__cplusplus) || defined(c_plusplus)