* when the variable is set to `NULL` right after freeing
* when the variable is checked for non-`NULL` before freeing
* when the variable is a global (because they should be set to `NULL`, even if we don't really claim that things can be re-init'd)
Testing Done:
Compiled, and ran tests in valgrind.
Reviewed at https://reviews.imfreedom.org/r/2369/
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"POT-Creation-Date: 2022-10-26 01:46-0500\n"
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"Last-Translator: Richard Laager <rlaager@wiktel.com>\n"