[Bug 52700] New: When using Korean, can't see the next characters properly.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52700

Bug ID: 52700
           Summary: When using Korean, can't see the next characters
                    properly.
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winex11.drv
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

When using Korean, can't see the next characters properly.

Input methods : IBUS, KIME, NABI, NIMF ( except "inputStyle=root" IME ie.,
fcitx )

Reproduce : 
1. XIMPreEditDrawCallback enabled
2. Input 0x314E(ㅎ), 0x314F(ㅏ), 0x3134(ㄴ)
3. Text(GUI) = 0xD55C(한) ( but, in-Composition. it is normal. )
4. Input 0x3131(ㄱ)
5. Text(GUI) = 0xD55C(한) .. (Expected 한ㄱ  0xD55C; 0x3131. it is bug. )
6. Input 0x3161(ㅡ)
6. Text(GUI) = 0xD55C(한)0xADF8(그) .. ( It is normal )