fixes out of bounds error on filtered selection #7

cursor.go

@@ -17,7 +17,14 @@ func NewGridCursor() *GridCursor {
 }
 
 func (gc *GridCursor) Len() int { return len(gc.filtered) }
-func (gc *GridCursor) Selected() *Container { return gc.filtered[gc.Idx()] }
+
+func (gc *GridCursor) Selected() *Container {
+	idx := gc.Idx()
+	if idx < gc.Len() {
+		return gc.filtered[idx]
+	}
+	return nil
+}
 
 // Refresh containers from source
 func (gc *GridCursor) RefreshContainers() (lenChanged bool) {

grid.go

@@ -132,7 +132,10 @@ func Display() bool {
 		return false
 	}
 	if expand {
-		ExpandView(cursor.Selected())
+		c := cursor.Selected()
+		if c != nil {
+			ExpandView(c)
+		}
 		return false
 	}
 	return true