cleanup: remove tree parameter where possible
commit1d48cb829acc513b5b00b5db27ab57a8c643f189
authorPetr Tesarik <petr@tesarici.cz>
Mon, 8 Oct 2012 06:48:13 +0000 (8 08:48 +0200)
committerPetr Tesarik <petr@tesarici.cz>
Tue, 9 Oct 2012 03:50:39 +0000 (9 05:50 +0200)
treeff6803071b5b4fb802318260ecd9d21185784ccc
parentf0011681b579e5172171f39b6ac2227ad0ca03d3
cleanup: remove tree parameter where possible

The tree parameter was sometimes only used to get the address of the
null node. It can be dropped in those places.
libhed/file.c
libhed/tree.c
libhed/tree.h