File GraphicsMagick-write-tiff-div-by-zero.patch of Package GraphicsMagick.7782

Index: GraphicsMagick-1.3.20/coders/tiff.c
===================================================================
--- GraphicsMagick-1.3.20.orig/coders/tiff.c	2016-10-11 12:59:09.898149555 +0200
+++ GraphicsMagick-1.3.20/coders/tiff.c	2016-10-11 13:00:03.154988223 +0200
@@ -4128,7 +4128,9 @@ WriteTIFFImage(const ImageInfo *image_in
         uncompressed data.
       */
       scanline_size=TIFFScanlineSize(tiff);
-      rows_per_strip=TIFFDefaultStripSize(tiff,0);
+      rows_per_strip=1;
+      if (TIFFScanlineSize(tiff) != 0)
+        rows_per_strip=TIFFDefaultStripSize(tiff,0);
       if (rows_per_strip < 1)
         rows_per_strip=1;
       /*