[PATCH] comctl32: Dont Recalculate Visible Order after removing all children.

[Alistair Leslie-Hughes]

Calling Expand with TVE_COLLAPSE | TVE_COLLAPSERESET which removes
all child items and results in infoPtr->firstVisible being NULL. However
TREEVIEW_ComputeItemRect requires that firstVisible to be valid.

Signed-off-by: Alistair Leslie-Hughes 
---
 dlls/comctl32/treeview.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/comctl32/treeview.c b/dlls/comctl32/treeview.c
index 3c73964304..8babdf8d69 100644
--- a/dlls/comctl32/treeview.c
+++ b/dlls/comctl32/treeview.c
@@ -3391,7 +3391,8 @@ TREEVIEW_Collapse(TREEVIEW_INFO *infoPtr, TREEVIEW_ITEM *item,
    }
     }

-    TREEVIEW_RecalculateVisibleOrder(infoPtr, item);
+    if(!bRemoveChildren)
+        TREEVIEW_RecalculateVisibleOrder(infoPtr, item);

if (nextItem)
         scrollDist = -(scrollDist - nextItem->rect.top);