Nikolay Sivov : dwrite: Fix invalid cluster metrics array index access.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 3254a6b2d632050564d7a568963b6f110d68be63
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=3254a6b2d632050564d7a56896...

Author: Nikolay Sivov <nsivov(a)codeweavers.com>
Date:   Wed Jan 27 15:57:47 2016 +0300

dwrite: Fix invalid cluster metrics array index access.

Signed-off-by: Nikolay Sivov <nsivov(a)codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 dlls/dwrite/layout.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/dwrite/layout.c b/dlls/dwrite/layout.c
index 0300166..77426e9 100644
--- a/dlls/dwrite/layout.c
+++ b/dlls/dwrite/layout.c
@@ -3264,7 +3264,7 @@ static HRESULT WINAPI dwritetextlayout_DetermineMinWidth(IDWriteTextLayout2 *ifa
 
         /* Ignore trailing whitespace clusters, in case of single space range will
            be reduced to empty range, or [start,start+1). */
-        while ((end - 1) >= start && This->clustermetrics[end-1].isWhitespace)
+        while (end > start && This->clustermetrics[end-1].isWhitespace)
             end--;
 
         /* check if cluster range exceeds last minimal width */