Missing null terminator on various kernel32 signatures

[Pyrolistical]

Zig Version

0.13.0-dev.75+5c9eb4081

Mismatched signatures

1. GetCurrentDirectoryW
   

   zig/lib/std/os/windows/kernel32.zig

   Line 178 in 084c2cd

   pub extern "kernel32" fn GetCurrentDirectoryW(nBufferLength: DWORD, lpBuffer: ?[*]WCHAR) callconv(WINAPI) DWORD;

   
   lpBuffer should be null-terminated according to https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-getcurrentdirectory
2. FormatMessageW
   

   zig/lib/std/os/windows/kernel32.zig

   Line 160 in 084c2cd

   pub extern "kernel32" fn FormatMessageW(dwFlags: DWORD, lpSource: ?LPVOID, dwMessageId: Win32Error, dwLanguageId: DWORD, lpBuffer: [*]u16, nSize: DWORD, Arguments: ?*va_list) callconv(WINAPI) DWORD;

   
   lpBuffer should be null-terminated according to https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessagew
3. GetEnvironmentVariableW
   

   zig/lib/std/os/windows/kernel32.zig

   Line 189 in 084c2cd

   pub extern "kernel32" fn GetEnvironmentVariableW(lpName: LPWSTR, lpBuffer: [*]u16, nSize: DWORD) callconv(WINAPI) DWORD;

   
   lpBuffer should be null-terminated according to https://learn.microsoft.com/en-us/windows/win32/api/processenv/nf-processenv-getenvironmentvariablew
4. GetModuleFileNameW
   

   zig/lib/std/os/windows/kernel32.zig

   Line 199 in 084c2cd

   pub extern "kernel32" fn GetModuleFileNameW(hModule: ?HMODULE, lpFilename: [*]u16, nSize: DWORD) callconv(WINAPI) DWORD;

   
   lpFilename should be null-terminated according to https://learn.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulefilenamew
5. GetFullPathNameW
   

   zig/lib/std/os/windows/kernel32.zig

   Lines 220 to 225 in 084c2cd

   	pub extern "kernel32" fn GetFullPathNameW(
   	lpFileName: [*:0]const u16,
   	nBufferLength: u32,
   	lpBuffer: [*]u16,
   	lpFilePart: ?*?[*:0]u16,
   	) callconv(@import("std").os.windows.WINAPI) u32;

   
   lpBuffer should be null-terminated according to https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfullpathnamew

Fixing these would be a breaking change.

Expected Behavior

extern signatures should be correct

[alexrp]

See the discussion here: #22083 (comment)