build error

[winterwolf45]

hi thanks for write this project
when i trying build version 1.6.3
after write this command
ninja -C build
i have this error:

FAILED: swaylock.p/main.c.o
gcc -Iswaylock.p -I. -I.. -Iinclude -I../include -I/usr/include/cairo -I/usr/include/libpng16 -I/usr/include/freetype2 -I/usr/include/harfbuzz -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/sysprof-4 -I/usr/include/libxml2 -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libmount -I/usr/include/blkid -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c11 -O0 -Wno-unused-parameter -Wno-unused-result -Wundef -Wvla -fopenmp -mtune=native '-DSYSCONFDIR="//etc"' '-DSWAYLOCK_VERSION="1.6-3"' -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -pthread -MD -MQ swaylock.p/main.c.o -MF swaylock.p/main.c.o.d -o swaylock.p/main.c.o -c ../main.c
In function ‘load_config’,
    inlined from ‘main’ at ../main.c:1771:23:
../main.c:1670:25: error: ‘free’ called on pointer returned from a mismatched allocation function [-Werror=mismatched-dealloc]
 1670 |                         free(config);
      |                         ^~~~~~~~~~~~
../main.c:1645:24: note: returned from ‘*fopen64’
 1645 |         FILE *config = fopen(path, "r");
      |                        ^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors