user32: Update the edit control when the IME composition string is emptied.

[Michael Stefaniuc]

Hello,

Byeong-Sik Jeon wrote:
> I tested for this patch with the patched Xlib(XFilterEvent deadlock 
> problem with XInitThreads).
> https://bugs.freedesktop.org/show_bug.cgi?id=1182
> https://bugs.freedesktop.org/attachment.cgi?id=4874
> 
> Changelog:
>     Update the edit control when the "IME composition string" is emptied.
> ---
>  dlls/user/edit.c |    8 +++++---
>  1 files changed, 5 insertions(+), 3 deletions(-)
> 
> 
> ------------------------------------------------------------------------
> 
> diff --git a/dlls/user/edit.c b/dlls/user/edit.c
> index 5b38b68..c0410f1 100644
> --- a/dlls/user/edit.c
> +++ b/dlls/user/edit.c
> @@ -5335,7 +5335,7 @@ static void EDIT_GetCompositionStr(HWND
>  
>      dwBufLen = ImmGetCompositionStringW(hIMC, GCS_COMPSTR, NULL, 0);
>  
> -    if (dwBufLen <= 0)
> +    if (dwBufLen < 0)
>      {
>          ImmReleaseContext(hwnd, hIMC);
>          return;
> @@ -5349,7 +5349,8 @@ static void EDIT_GetCompositionStr(HWND
>          return;
>      }
>  
> -    ImmGetCompositionStringW(hIMC, GCS_COMPSTR, lpCompStr, dwBufLen);
> +    if (dwBufLen)
> +        ImmGetCompositionStringW(hIMC, GCS_COMPSTR, lpCompStr, dwBufLen);
>      lpCompStr[dwBufLen/sizeof(WCHAR)] = 0;
>  
>      if (CompFlag & GCS_COMPATTR)
> @@ -5396,7 +5397,8 @@ static void EDIT_GetCompositionStr(HWND
>      es->selection_start = es->composition_start;
>      es->selection_end = es->selection_start + es->composition_len;
>  
> -    HeapFree(GetProcessHeap(),0,lpCompStrAttr);
> +    if (lpCompStrAttr)
> +        HeapFree(GetProcessHeap(),0,lpCompStrAttr);
This change is not needed as HeapFree'ing NULL isn't an error.

>      HeapFree(GetProcessHeap(),0,lpCompStr);
>      ImmReleaseContext(hwnd,hIMC);
>  }

bye
	michael
-- 
Michael Stefaniuc               Tel.: +49-711-96437-199
Sr. Network Engineer            Fax.: +49-711-96437-111
Red Hat GmbH                    Email: mstefani at redhat.com
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