[Bug 20850] New: Write buffer overflow in WidenPath()

http://bugs.winehq.org/show_bug.cgi?id=20850

Summary: Write buffer overflow in WidenPath()
           Product: Wine
           Version: 1.1.33
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: download, source, testcase
          Severity: normal
          Priority: P2
         Component: gdi32
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

http://kegel.com/wine/valgrind/logs/2009-11-19-08.35/vg-gdi32_path.txt
has the warning
 Invalid write of size 4
    at  PATH_WidenPath (path.c:1911)
    by  WidenPath (path.c:2232)
    by  test_widenpath (path.c:68)
    by  func_path (path.c:508)
    by  run_test (test.h:535)
    by  main (test.h:585)
  Address 0x7f03bb48 is 0 bytes after a block of size 0 alloc'd
    at  notify_alloc (heap.c:279)
    by  RtlAllocateHeap (heap.c:1521)
    by  PATH_WidenPath (path.c:1910)
    by  WidenPath (path.c:2232)
    by  test_widenpath (path.c:68)

The same problem appears in current sources, and has probably
been there since 2007.

Looking at WidenPath(), it seems that maybe numStrokes should
start at 1, not 0?