indent: Avoid using values of pointers that refer to deallocated space.

For now maintain the local style in this file.

Reviewed by: jilles

Reference:
https://github.com/pstef/freebsd_indent/commit/9099a9f17bc5f579514a4c11111f5cf3df6624c6

Differential Revision: https://reviews.freebsd.org/D6966 (Partial)
Submitted by: Piotr Stefaniak