[PATCH] Fix BUILTINS_LOCATION with -fpreprocessed (PR preprocessor/41543)

[Tom Tromey]

>>>>> "Jakub" == Jakub Jelinek <jakub@redhat.com> writes:

Jakub> 2009-10-12  Jakub Jelinek  <jakub@redhat.com>
[...]
Jakub> 	* include/line-map.h (RESERVED_LOCATION_COUNT): Define.
Jakub> 	* line-map.c (linemap_init): Initialize highest_location and
Jakub> 	highest_line to RESERVED_LOCATION_COUNT-1 instead of 0.

The libcpp parts are ok.
I can't approve the other parts, but they look fine to me.

Tom