From: Roy Tam
Subject: Handle Microsoft ZIP64 files by ignoring invalid "Total number of disks" field
Origin: https://sourceforge.net/p/infozip/bugs/42/
Bug: https://sourceforge.net/p/infozip/bugs/42/
Bug-Debian: https://bugs.debian.org/1064000
Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/2051952
X-Debian-version: 6.0-29

--- a/process.c
+++ b/process.c
@@ -1281,7 +1281,7 @@
     fprintf(stdout,"\nnumber of disks (ECR) %u, (ECLOC64) %lu\n",
             G.ecrec.number_this_disk, ecloc64_total_disks); fflush(stdout);
 #endif
-    if ((G.ecrec.number_this_disk != 0xFFFF) &&
+    if ((G.ecrec.number_this_disk != 0xFFFF) && ecloc64_total_disks &&
         (G.ecrec.number_this_disk != ecloc64_total_disks - 1)) {
       /* Note: For some unknown reason, the developers at PKWARE decided to
          store the "zip64 total disks" value as a counter starting from 1,