Allow dropping unknown characters.

unicows just doesn't understand emojis :(

Author: seritools

library/std/src/sys/windows/stdio.rs

@@ -183,7 +183,7 @@ fn write_valid_utf8_to_console(handle: c::HANDLE, utf8: &str) -> io::Result<usiz
         // where the underlying byte sequence is valid utf-8 (given the check in `write()`).
         let result = c::MultiByteToWideChar(
             c::CP_UTF8,                      // CodePage
-            c::MB_ERR_INVALID_CHARS,         // dwFlags
+            0,                               // dwFlags
             utf8.as_ptr(),                   // lpMultiByteStr
             utf8.len() as c::c_int,          // cbMultiByte
             utf16.as_mut_ptr() as c::LPWSTR, // lpWideCharStr