The header files in src/code aren't installed.

Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=2124

Reported by @grubba

From: Ludger Merkens <balduin@uni-paderborn.de>
To: "grubba@roxen.com" <grubba@roxen.com>
Date: Sat, 1 Sep 2001 18:25:19 +0200 (MET DST)
Subject: Missing include file.

Hello Grubba,

I recently tried to compile a c glue file (for sablotron in this case) against a pike 7.3 from cvs. It seems, that the subdirectory code is missing from the include path pike/7.3.11/include/pike.

I assume this is a glitch of the install script. At least after a copy of the directory from the CVS src directory, the build worked fine.

best regards Ludger Merkens