Log Message:
emulators/ucon64: Fix for libz >= 1.2.6

As previously predicted, the horrible code in archive.c wouldn't last long
before breaking.  There were a few dozen errors erupting when libz 1.2.7
header was used.  The previous patch-af was appended, but the previous fix
for linux was changed because that was broken too.

Info: typedef of gzFile changed from void* at version 1.2.6, so its use
is no longer optional with libz versions >= 1.2.6.