--- a/dwtx/ui/forms/widgets/TableWrapLayout.d	Fri Jun 20 13:00:15 2008 +0200
+++ b/dwtx/ui/forms/widgets/TableWrapLayout.d	Fri Jun 20 14:48:17 2008 +0200
@@ -339,7 +339,7 @@
                     size = new Point(size.x, td.heightHint);
                 }
                 td.compSize = size;
-                RowSpan rowspan = cast(RowSpan) rowspans.get(child);
+                RowSpan rowspan = rowspans.containsKey(child) ? cast(RowSpan) rowspans.get(child) : null;
                 if (rowspan is null) {
                     rowHeights[i] = Math.max(rowHeights[i], size.y);
                 } else
@@ -431,7 +431,7 @@
         int width = td.compSize.x-td.indent;
         width = Math.min(width, colWidth);
         int slotHeight = rowHeights[row];
-        RowSpan rowspan = cast(RowSpan) rowspans.get(control);
+        RowSpan rowspan = rowspans.containsKey(control) ? cast(RowSpan) rowspans.get(control) : null;
         if (rowspan !is null) {
             slotHeight = 0;
             for (int i = row; i < row + td.rowspan; i++) {
@@ -687,7 +687,7 @@
                     Point size = computeSize(td.childIndex, cwidth, td.indent, td.maxWidth, td.maxHeight);
                     cy = size.y;
                 }
-                RowSpan rowspan = cast(RowSpan) rowspans.get(child);
+                RowSpan rowspan = rowspans.containsKey(child) ? cast(RowSpan) rowspans.get(child) : null;
                 if (rowspan !is null) {
                     // don't take the height of this child into acount
                     // because it spans multiple rows