Fix rastertoepson allocation bug in unused driver code (Issue #1537)

Author: michaelrsweet

CHANGES.md

@@ -165,6 +165,7 @@ v2.5b1 - YYYY-MM-DD
 - Fixed missing write check in `cupsFileOpen/Fd` (Issue #1360)
 - Fixed error recovery when scanning for PPDs in `cups-driverd` (Issue #1416)
 - Fixed allowed values for directive `FilterNice`
+- Fixed an allocation bug in the `rastertoepson` filter (Issue #1537)
 - Removed hash support for SHA2-512-224 and SHA2-512-256.
 - Removed `mantohtml` script for generating html pages (use
   `https://www.msweet.org/mantohtml/`)

filter/rastertoepson.c

@@ -298,7 +298,7 @@ StartPage(
 
   if (header->cupsCompression || DotBytes)
   {
-    if ((CompBuffer = calloc(2, header->cupsWidth + 1)) == NULL)
+    if ((CompBuffer = calloc(2, header->cupsBytesPerLine + 1)) == NULL)
     {
       fputs("ERROR: Unable to allocate memory\n", stderr);
       exit(1);