画像プレビューで例外が起きる場合があったので対処

git-svn-id: http://svn.sourceforge.jp/svnroot/tween/trunk@360 e39ad16e-3079-482e-bb30-4b4d378143b6

diff --git a/Tween/Tween.vb b/Tween/Tween.vb
index 99a846e..d76b721 100644 (file)
--- a/Tween/Tween.vb
+++ b/Tween/Tween.vb
@@ -8331,7 +8331,7 @@ RETRY:
                 End If
                 Me.PreviewScrollBar.Value = 0
                 Me.PreviewPicture.Image = _prev.pics(0).Value
-            ElseIf _prev IsNot Nothing AndAlso _curPost.Id <> _prev.statusId Then
+            ElseIf _curPost Is Nothing OrElse (_prev IsNot Nothing AndAlso _curPost.Id <> _prev.statusId) Then
                 Me.PreviewScrollBar.Maximum = 0
                 Me.PreviewScrollBar.Enabled = False
                 Me.SplitContainer3.Panel2Collapsed = True