fixed some compile errors

1 files changed, 4 insertions, 4 deletions

diff --git a/src/client/northstar/dash-nodes/HistogramBox.tsx b/src/client/northstar/dash-nodes/HistogramBox.tsx
index 765ecf8f0..5e7b867b3 100644
--- a/src/client/northstar/dash-nodes/HistogramBox.tsx
+++ b/src/client/northstar/dash-nodes/HistogramBox.tsx
@@ -117,15 +117,15 @@ export class HistogramBox extends React.Component<FieldViewProps> {
             runInAction(() => {
                 this.HistoOp = histoOp ? histoOp.HistoOp : HistogramOperation.Empty;
                 if (this.HistoOp !== HistogramOperation.Empty) {
-                    reaction(() => Cast(this.props.Document.linkedFromDocs, listSpec(Doc), []), (docs) => this.HistoOp.Links.splice(0, this.HistoOp.Links.length, ...docs), { fireImmediately: true });
+                    reaction(() => Cast(this.props.Document.linkedFromDocs, listSpec(Doc), []).filter(d => d).map(d => d as Doc), (docs) => this.HistoOp.Links.splice(0, this.HistoOp.Links.length, ...docs), { fireImmediately: true });
                     reaction(() => Cast(this.props.Document.brushingDocs, listSpec(Doc), []).length,
                         () => {
-                            let brushingDocs = Cast(this.props.Document.brushingDocs, listSpec(Doc), []);
+                            let brushingDocs = Cast(this.props.Document.brushingDocs, listSpec(Doc), []).filter(d => d).map(d => d as Doc);
                             const proto = this.props.Document.proto;
                             if (proto) {
                                 this.HistoOp.BrushLinks.splice(0, this.HistoOp.BrushLinks.length, ...brushingDocs.map((brush, i) => {
-                                    brush.bckgroundColor = StyleConstants.BRUSH_COLORS[i % StyleConstants.BRUSH_COLORS.length];
-                                    let brushed = Cast(brush.brushingDocs, listSpec(Doc), []);
+                                    brush.backgroundColor = StyleConstants.BRUSH_COLORS[i % StyleConstants.BRUSH_COLORS.length];
+                                    let brushed = Cast(brush.brushingDocs, listSpec(Doc), []).filter(d => d).map(d => d as Doc);
                                     return { l: brush, b: brushed[0][Id] === proto[Id] ? brushed[1] : brushed[0] };
                                 }));
                             }