comdlg32: fix a crash in LookIn combo box WM_COMMAND message handler

[Rein Klazes]

Fix for bug #18155
---
 dlls/comdlg32/filedlg.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/dlls/comdlg32/filedlg.c b/dlls/comdlg32/filedlg.c
index 4c2164d..8c8e230 100644
--- a/dlls/comdlg32/filedlg.c
+++ b/dlls/comdlg32/filedlg.c
@@ -2787,6 +2787,8 @@ static BOOL FILEDLG95_LOOKIN_OnCommand(HWND hwnd, WORD wNotifyCode)
 
       iItem = CBGetCurSel(fodInfos->DlgInfos.hwndLookInCB);
 
+      if( iItem == CB_ERR) return FALSE;
+
       if(!(tmpFolder = (LPSFOLDER) CBGetItemDataPtr(fodInfos->DlgInfos.hwndLookInCB,
                                                iItem)))
 	return FALSE;
-- 
1.6.2.1