localui: Avoid sizeof on structs with a varlength array.

[Michael Stefaniuc]

---
 dlls/localui/localui.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/dlls/localui/localui.c b/dlls/localui/localui.c
index b9e4c4e..382e2db 100644
--- a/dlls/localui/localui.c
+++ b/dlls/localui/localui.c
@@ -122,7 +122,7 @@ static BOOL dlg_configure_com(HANDLE hXcv, HWND hWnd, PCWSTR pPortName)
         shortname[len-1] = '\0';
 
         /* get current settings */
-        len = sizeof(cfg);
+        len = FIELD_OFFSET(COMMCONFIG, wcProviderData[1]);
         status = ERROR_SUCCESS;
         res = XcvDataW( hXcv, cmd_GetDefaultCommConfigW,
                         (PBYTE) shortname,
-- 
1.7.7.6