TREEVIEW_DoSelectItem should not do TVGN_FIRSTVISIBLE work if selected item is NULL

[Evan Deaubl]

ChangeLog:
* TREEVIEW_DoSelectItem should not do any of the TVGN_FIRSTVISIBLE work if the newSelect parameter is NULL

--- wine-20050310/dlls/comctl32/treeview.c      2005-02-22 12:31:01.000000000 -0
700
+++ wine-20050310.new/dlls/comctl32/treeview.c  2005-03-13 11:05:05.940619648 -0
700
@@ -4242,9 +4242,12 @@
        break;

     case TVGN_FIRSTVISIBLE:
-       TREEVIEW_EnsureVisible(infoPtr, newSelect, FALSE);
-       TREEVIEW_SetFirstVisible(infoPtr, newSelect, TRUE);
-       TREEVIEW_Invalidate(infoPtr, NULL);
+       if (newSelect != NULL)
+       {
+           TREEVIEW_EnsureVisible(infoPtr, newSelect, FALSE);
+           TREEVIEW_SetFirstVisible(infoPtr, newSelect, TRUE);
+           TREEVIEW_Invalidate(infoPtr, NULL);
+       }
        break;
     }