Unzip doesn't handle large zip files well and crashes:

"This only happens if you have more then 16k entries and when one of
the 16k entry infos is reused it happend to be previously used for
a symlink entry."

This patch is taken from Fedora (https://bugzilla.redhat.com/show_bug.cgi?id=972427)

Upstream-Status: Pending (upstream is dead)
Signed-off-by: Ross Burton <ross.burton@intel.com>

--- unzip60/process.c.sav	2013-06-09 12:08:57.070392264 +0200
+++ unzip60/process.c	2013-06-09 12:10:08.641696988 +0200
@@ -1751,6 +1751,12 @@
         = (G.crec.general_purpose_bit_flag & (1 << 11)) == (1 << 11);
 #endif
 
+#ifdef SYMLINKS
+    /* Initialize the symlink flag, may be set by the platform-specific
+       mapattr function.  */
+    G.pInfo->symlink = 0;
+#endif 
+
     return PK_COOL;
 
 } /* end function process_cdir_file_hdr() */