Compilation of fastfetch-1.11.3 fails under musl-libc

[mc680x0]

Expected behaviour: successful compilation

Behaviour produced: compilation fails at object "brightness_linux" with the error 'PATH_MAX' undeclared

Fix:
Under musl-libc, PATH_MAX is provided in limits.h - adding
#include <limits.h> to src/detection/brightness/brightness_linux.c allows fastfetch to compile with no errors, and runs correctly.

I note that src/logo/image/image.c also uses PATH_MAX, and should also have this include provided to ensure correct building against musl-libc.

Output from build:
[97/139] /usr/bin/x86_64-gentoo-linux-musl-gcc -DFF_ENABLE_BUFFER -DFF_HAVE_LIBPCI=1 -DFF_HAVE_SQLITE3=1 -DFF_HAVE_THREADS -DFF_HAVE_UTMPX_H -D_GNU_SOURCE -I/var/tmp/portage/app-misc/fastfetch-1.11.3/work/fastfetch-1.11.3_build -I/var/tmp/portage/app-misc/fastfetch-1.11.3/work/fastfetch-1.11.3/src -DNDEBUG -march=sandybridge -O2 -mfpmath=sse -fstack-protector-strong -pipe -Wall -Wextra -Wconversion -std=gnu11 -flto=auto -fno-fat-lto-objects -MD -MT CMakeFiles/libfastfetch.dir/src/detection/brightness/brightness_linux.c.o -MF CMakeFiles/libfastfetch.dir/src/detection/brightness/brightness_linux.c.o.d -o CMakeFiles/libfastfetch.dir/src/detection/brightness/brightness_linux.c.o -c /var/tmp/portage/app-misc/fastfetch-1.11.3/work/fastfetch-1.11.3/src/detection/brightness/brightness_linux.c FAILED: CMakeFiles/libfastfetch.dir/src/detection/brightness/brightness_linux.c.o /usr/bin/x86_64-gentoo-linux-musl-gcc -DFF_ENABLE_BUFFER -DFF_HAVE_LIBPCI=1 -DFF_HAVE_SQLITE3=1 -DFF_HAVE_THREADS -DFF_HAVE_UTMPX_H -D_GNU_SOURCE -I/var/tmp/portage/app-misc/fastfetch-1.11.3/work/fastfetch-1.11.3_build -I/var/tmp/portage/app-misc/fastfetch-1.11.3/work/fastfetch-1.11.3/src -DNDEBUG -march=sandybridge -O2 -mfpmath=sse -fstack-protector-strong -pipe -Wall -Wextra -Wconversion -std=gnu11 -flto=auto -fno-fat-lto-objects -MD -MT CMakeFiles/libfastfetch.dir/src/detection/brightness/brightness_linux.c.o -MF CMakeFiles/libfastfetch.dir/src/detection/brightness/brightness_linux.c.o.d -o CMakeFiles/libfastfetch.dir/src/detection/brightness/brightness_linux.c.o -c /var/tmp/portage/app-misc/fastfetch-1.11.3/work/fastfetch-1.11.3/src/detection/brightness/brightness_linux.c /var/tmp/portage/app-misc/fastfetch-1.11.3/work/fastfetch-1.11.3/src/detection/brightness/brightness_linux.c: In function 'ffDetectBrightness': /var/tmp/portage/app-misc/fastfetch-1.11.3/work/fastfetch-1.11.3/src/detection/brightness/brightness_linux.c:44:47: error: 'PATH_MAX' undeclared (first use in this function) 44 | ffStrbufInitA(&display->name, PATH_MAX + 1); | ^~~~~~~~ /var/tmp/portage/app-misc/fastfetch-1.11.3/work/fastfetch-1.11.3/src/detection/brightness/brightness_linux.c:44:47: note: each undeclared identifier is reported only once for each function it appears in

[LinusDierheimer]

Everything should now build fine with musl, we even have a test for that in our pipeline now.