ece8480fc2
According to https://en.cppreference.com/mwiki/index.php?title=c/locale/setlocale&oldid=171500 , `setlocale` "returns null value on failure": > Return value > pointer to a narrow null-terminated string identifying the C locale > after applying the changes, if any, or null pointer on failure. Example program: ```zig const std = @import("std"); pub fn main() void { const ptr = std.c.setlocale(.ALL, "non_existent"); std.debug.print("ptr = {d}\n", .{@intFromPtr(ptr)}); } ``` Output: ```console ptr = 0 ``` Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>