Windows Vista to Windows 10 1507 expect pfnFillTextBuffer() to return
WBREAK_E_END_OF_TEXT to signal the end of the string. Returning
unexpected values such as E_FAIL causes BreakText() to abort and report
them to the caller.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50843Signed-off-by: Francois Gouget <fgouget@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>