the vararg list must be terminated with zero else 64bit machines may crash

On 64 bit systems, the integer 0 is 32 bits and the pointer 0 is 64 bits.
The upper 32 bits will not be cleared and the loop will never terminate.
Also add the RAZOR_SENTINEL __attribute__ ((__sentinel__(0))) on GCC4
so we catch where we get this wrong automatically.

This also fixes the new search functionality from James which was missed
in the merge.

prefix=@prefix@

exec_prefix=@exec_prefix@

libdir=@libdir@

includedir=@includedir@

Name: razor

Description: library for depsolving, installing and removing packages

Version: @VERSION@

Requires: libcurl

Libs: -L${libdir} -lexpat -lz -lrazor

Cflags: -I${includedir}/razor