Dylan Smith : richedit: Prevent an unsigned integer underflow.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ee19ec056a417fbd705f62b3ccd392023bcfe8ae
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=ee19ec056a417fbd705f62b3ccd392023bcfe8ae

Author: Dylan Smith <dylan.ah.smith at gmail.com>
Date:   Sun Jan 11 02:59:38 2009 -0500

richedit: Prevent an unsigned integer underflow.

---

 dlls/riched20/paint.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/dlls/riched20/paint.c b/dlls/riched20/paint.c
index f0acf4a..b6430e4 100644
--- a/dlls/riched20/paint.c
+++ b/dlls/riched20/paint.c
@@ -1127,7 +1127,7 @@ int ME_GetYScrollPos(ME_TextEditor *editor)
 
 BOOL ME_GetYScrollVisible(ME_TextEditor *editor)
 { /* Returns true if the scrollbar is visible */
-  return (editor->vert_si.nMax - editor->vert_si.nMin >= max(editor->vert_si.nPage - 1, 0));
+  return (editor->vert_si.nMax - editor->vert_si.nMin > editor->vert_si.nPage);
 }
 
 void ME_EnsureVisible(ME_TextEditor *editor, ME_DisplayItem *pRun)