pidgin/pidgin

Use NULL instead of null_parse_tree

2020-12-20, Arkadiy Illarionov
2010d1935fb0
Use NULL instead of null_parse_tree

Also some related cleanup.

Testing Done:
Compile.

Reviewed at https://reviews.imfreedom.org/r/297/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?