Nikolay Sivov : dwrite/layout: Fix invalid index access to cluster array.

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: f757ea635cd29d98d1d8ae0078bcc83aa658dc9d
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=f757ea635cd29d98d1d8ae0078bcc83aa658dc9d

Author: Nikolay Sivov <nsivov at codeweavers.com>
Date:   Mon Apr 15 18:22:46 2019 +0300

dwrite/layout: Fix invalid index access to cluster array.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=45543
Signed-off-by: Nikolay Sivov <nsivov at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
(cherry picked from commit 571ffaf380f3d80da60ff8bca4031baceefa7811)
Signed-off-by: Michael Stefaniuc <mstefani at winehq.org>

---

 dlls/dwrite/layout.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dlls/dwrite/layout.c b/dlls/dwrite/layout.c
index a562927..d958f8d 100644
--- a/dlls/dwrite/layout.c
+++ b/dlls/dwrite/layout.c
@@ -1853,6 +1853,9 @@ static void layout_add_line(struct dwrite_textlayout *layout, UINT32 first_clust
 
         metrics.trailingWhitespaceLength += cluster->length;
         trailingspacewidth += cluster->width;
+
+        if (index == 0)
+            break;
     }
 
     /* Line metrics length includes trailing whitespace length too */