Nikolay Sivov : comctl32/listview: Don't query header if it isn't created.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: aaec03347d3ab19d8322742095f66e257647f4d7
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=aaec03347d3ab19d8322742095f66e257647f4d7

Author: Nikolay Sivov <bunglehead at gmail.com>
Date:   Thu Oct 22 00:29:00 2009 +0400

comctl32/listview: Don't query header if it isn't created.

---

 dlls/comctl32/listview.c |   30 +++++++++++++++++-------------
 1 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/dlls/comctl32/listview.c b/dlls/comctl32/listview.c
index 3744e10..4ec8628 100644
--- a/dlls/comctl32/listview.c
+++ b/dlls/comctl32/listview.c
@@ -10326,19 +10326,23 @@ static void LISTVIEW_UpdateSize(LISTVIEW_INFO *infoPtr)
     }
     else if (infoPtr->uView == LV_VIEW_DETAILS)
     {
-	HDLAYOUT hl;
-	WINDOWPOS wp;
-
-	hl.prc = &infoPtr->rcList;
-	hl.pwpos = &wp;
-	SendMessageW( infoPtr->hwndHeader, HDM_LAYOUT, 0, (LPARAM)&hl );
-        TRACE("  wp.flags=0x%08x, wp=%d,%d (%dx%d)\n", wp.flags, wp.x, wp.y, wp.cx, wp.cy);
-	SetWindowPos(wp.hwnd, wp.hwndInsertAfter, wp.x, wp.y, wp.cx, wp.cy,
-                    wp.flags | ((infoPtr->dwStyle & LVS_NOCOLUMNHEADER)
-                        ? SWP_HIDEWINDOW : SWP_SHOWWINDOW));
-        TRACE("  after SWP wp=%d,%d (%dx%d)\n", wp.x, wp.y, wp.cx, wp.cy);
-
-	infoPtr->rcList.top = max(wp.cy, 0);
+	/* if control created invisible header isn't created */
+	if (infoPtr->hwndHeader)
+	{
+	    HDLAYOUT hl;
+	    WINDOWPOS wp;
+
+	    hl.prc = &infoPtr->rcList;
+	    hl.pwpos = &wp;
+	    SendMessageW( infoPtr->hwndHeader, HDM_LAYOUT, 0, (LPARAM)&hl );
+            TRACE("  wp.flags=0x%08x, wp=%d,%d (%dx%d)\n", wp.flags, wp.x, wp.y, wp.cx, wp.cy);
+	    SetWindowPos(wp.hwnd, wp.hwndInsertAfter, wp.x, wp.y, wp.cx, wp.cy,
+                         wp.flags | ((infoPtr->dwStyle & LVS_NOCOLUMNHEADER)
+                         ? SWP_HIDEWINDOW : SWP_SHOWWINDOW));
+	    TRACE("  after SWP wp=%d,%d (%dx%d)\n", wp.x, wp.y, wp.cx, wp.cy);
+
+	    infoPtr->rcList.top = max(wp.cy, 0);
+	}
         infoPtr->rcList.top += (infoPtr->dwLvExStyle & LVS_EX_GRIDLINES) ? 2 : 0;
     }