[Bug 45339] New: Codepage 54936 (GB18030) not supported

https://bugs.winehq.org/show_bug.cgi?id=45339

Bug ID: 45339
           Summary: Codepage 54936 (GB18030) not supported
           Product: Wine
           Version: unspecified
          Hardware: Other
                OS: other
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: kernel32
          Assignee: [e-mail]
          Reporter: [e-mail]

There is no gb18030 codepage file in wine/libs/port directory.

So in Wine all versions up to 3.10:

IsValidCodePage(54936) returns false;
MultiByteToWideChar(54936, ...) does not work;

But in Windows XP+:

IsValidCodePage(54936) returns true;
MultiByteToWideChar(54936, ...) does work;