free cache_tmpfile in tns_free (#485)

doesn't really matter since the process is about to exit
anyways, but makes it consistent with everything else.

Reviewed-on: https://codeberg.org/nsxiv/nsxiv/pulls/485

README.md

@@ -81,8 +81,8 @@ you want to build nsxiv on a distribution with separate runtime and development
 packages (e.g. \*-dev on Debian).
 
 \* [inotify][] is a Linux-specific API for monitoring filesystem changes.
-  It's not natively available on `*BSD` systems but can be enabed via installing
-  and linking against [libinotify-kqueue][].
+  It's not natively available on `*BSD` systems but can be enabled via
+  installing and linking against [libinotify-kqueue][].
 
 [inotify]: https://www.man7.org/linux/man-pages/man7/inotify.7.html
 [libinotify-kqueue]: https://github.com/libinotify-kqueue/libinotify-kqueue

etc/woodpecker/clang-tidy-checks

@@ -4,13 +4,13 @@ misc-*,android-cloexec-*,llvm-include-order
 -readability-*,readability-duplicate-include,readability-misleading-indentation
 
 # silence
--misc-unused-parameters
+-misc-unused-parameters,-misc-include-cleaner,-misc-no-recursion
 -bugprone-easily-swappable-parameters,-bugprone-narrowing-conversions,-bugprone-incorrect-roundings
 -bugprone-implicit-widening-of-multiplication-result,-bugprone-integer-division
 -android-cloexec-fopen,-android-cloexec-pipe,-cert-err33-c
 -bugprone-assignment-in-if-condition
 -bugprone-suspicious-realloc-usage
+-bugprone-switch-missing-default-case
 
 # false positive warnings
 -clang-analyzer-valist.Uninitialized
--misc-no-recursion

thumbs.c

@@ -198,6 +198,8 @@ CLEANUP void tns_free(tns_t *tns)
 
 	free(cache_dir);
 	cache_dir = NULL;
+	free(cache_tmpfile);
+	cache_tmpfile = cache_tmpfile_base = NULL;
 }
 
 static Imlib_Image tns_scale_down(Imlib_Image im, int dim)