[reactos] 01/01: [WIN32K:NTUSER] Avoid dereferencing a null pointer in NC_DoNCPaint. CORE-15569

[Thomas Faber]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=b2dcb8e0d8925fc1aed2ad...

commit b2dcb8e0d8925fc1aed2adeaf74ad0291e29f8f6
Author:     Thomas Faber [e-mail]
AuthorDate: Tue Jan 8 11:26:26 2019 +0100
Commit:     Thomas Faber [e-mail]
CommitDate: Tue Jan 8 11:27:33 2019 +0100

[WIN32K:NTUSER] Avoid dereferencing a null pointer in NC_DoNCPaint. CORE-15569
---
 win32ss/user/ntuser/nonclient.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/win32ss/user/ntuser/nonclient.c b/win32ss/user/ntuser/nonclient.c
index 44476f8cee..8f45582142 100644
--- a/win32ss/user/ntuser/nonclient.c
+++ b/win32ss/user/ntuser/nonclient.c
@@ -1148,11 +1148,13 @@ NC_DoNCPaint(PWND pWnd, HDC hDC, INT Flags)
         FillRect(hDC, &TempRect, IntGetSysColorBrush(COLOR_BTNFACE));

if (Parent)
+        {
            IntGetClientRect(Parent, &ParentClientRect);

-        if (HASSIZEGRIP(Style, ExStyle, Parent->style, WindowRect, ParentClientRect))
-        {
-           DrawFrameControl(hDC, &TempRect, DFC_SCROLL, DFCS_SCROLLSIZEGRIP);
+           if (HASSIZEGRIP(Style, ExStyle, Parent->style, WindowRect, ParentClientRect))
+           {
+              DrawFrameControl(hDC, &TempRect, DFC_SCROLL, DFCS_SCROLLSIZEGRIP);
+           }
         }

IntDrawScrollBar(pWnd, hDC, SB_VERT);