[Bug 28823] New: riched20/tests/editor.ok: TRACE() of uninitialized value triggered by test_word_movement()?

http://bugs.winehq.org/show_bug.cgi?id=28823

Bug #: 28823
           Summary: riched20/tests/editor.ok: TRACE() of uninitialized
                    value triggered by test_word_movement()?
           Product: Wine
           Version: 1.3.30
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: trivial
          Priority: P2
         Component: richedit
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

Valgrind complains:

Conditional jump or move depends on uninitialised value(s)
    at _itoa_word (_itoa.c:196)
    by vfprintf (vfprintf.c:1619)
    by vsprintf (iovsprintf.c:43)
    by sprintf (sprintf.c:34)
    by default_dbgstr_wn (debug.c:374)
    by NTDLL_dbgstr_wn (debugtools.c:107)
    by wine_dbgstr_wn (debug.c:421)
    by debugstr_wn (debug.h:257)
    by ME_WordBreakProc (string.c:183)
    by ME_CallWordBreakProc (string.c:214)
    by ME_MoveCursorWords (caret.c:741)
    by ME_ArrowKey (caret.c:1579)
    by ME_KeyDown (editor.c:2110)
    by ME_HandleMessage (editor.c:4028)
    by RichEditWndProc_common (editor.c:4499)
    by RichEditWndProcA (editor.c:4524)
    by ??? (winproc.c:172)
    by call_window_proc (winproc.c:242)
    by WINPROC_call_window (winproc.c:908)
    by call_window_proc (message.c:2211)
    by send_message (message.c:3084)
    by SendMessageA (message.c:3286)
    by send_ctrl_key (editor.c:4665)
    by test_word_movement (editor.c:5952)
  Uninitialised value was created by a client request
    at mark_block_uninitialized (heap.c:208)
    by initialize_block (heap.c:239)
    by RtlAllocateHeap (heap.c:1703)
    by heap_alloc (editor.h:30)
    by ME_MakeStringB (string.c:39)
    by ME_MakeStringN (string.c:46)
    by ME_InsertRunAtCursor (run.c:372)
    by ME_InternalInsertTextFromCursor (caret.c:467)
    by ME_InsertTextFromCursor (caret.c:541)
    by ME_HandleMessage (editor.c:3565)
    by RichEditWndProc_common (editor.c:4499)
    by RichEditWndProcA (editor.c:4524)
    by ??? (winproc.c:172)
    by call_window_proc (winproc.c:242)
    by WINPROC_call_window (winproc.c:908)
    by call_window_proc (message.c:2211)
    by send_message (message.c:3084)
    by SendMessageA (message.c:3286)
    by test_word_movement (editor.c:5947)