builtin: fix windows build

Author: medvednikov

vlib/builtin/builtin_windows.c.v

@@ -43,8 +43,6 @@ pub type C.LPCTSTR = &C.TCHAR
 
 fn C.WriteConsoleW(voidptr, &u16, u32, &u32, voidptr) bool
 
-fn C._fileno(&C.FILE) int
-
 fn C._setmode(int, int) int
 
 // set_stream_binary_mode disables CRT newline translation for redirected stdio streams.
@@ -74,10 +72,9 @@ fn write_buf_to_console(fd int, buf &u8, buf_len int) bool {
 	if buf_len <= 0 || is_terminal(fd) <= 0 {
 		return false
 	}
-	console_handle := if fd == 2 {
-		C.GetStdHandle(std_error_handle)
-	} else {
-		C.GetStdHandle(std_output_handle)
+	mut console_handle := C.GetStdHandle(std_output_handle)
+	if fd == 2 {
+		console_handle = C.GetStdHandle(std_error_handle)
 	}
 	if isnil(console_handle) {
 		return false

vlib/builtin/cfns.c.v

@@ -278,7 +278,7 @@ fn C.syscall(number i32, va ...voidptr) i32
 fn C.sysctl(name &int, namelen u32, oldp voidptr, oldlenp voidptr, newp voidptr, newlen usize) i32
 
 @[trusted]
-fn C._fileno(i32) i32
+fn C._fileno(&C.FILE) i32
 
 pub type C.intptr_t = voidptr
 

vlib/os/os_windows.c.v

@@ -26,6 +26,8 @@ fn C.CreateHardLinkW(&u16, &u16, C.SECURITY_ATTRIBUTES) i32
 // See https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-getshortpathnamew
 fn C.GetShortPathNameW(&u16, &u16, u32) u32
 
+fn C.AddVectoredExceptionHandler(u32, voidptr) voidptr
+
 fn C._getpid() i32
 
 const executable_suffixes = ['.exe', '.bat', '.cmd', '']