1 files changed, 4 insertions, 0 deletions
diff --git a/paint.js b/paint.js
index b4c55b1..6e4ae8b 100644
--- a/paint.js
+++ b/paint.js
@@ -92,6 +92,7 @@ function PaintEditorMorph() {
 }
 
 PaintEditorMorph.prototype.init = function () {
+    PaintEditorMorph.uber.init.call(this);
     // additional properties:
     this.paper = null; // paint canvas
     this.oncancel = null;
@@ -485,6 +486,7 @@ function PaintColorPickerMorph(extent, action) {
 }
 
 PaintColorPickerMorph.prototype.init = function (extent, action) {
+    PaintColorPickerMorph.uber.init.call(this);
     this.setExtent(extent || new Point(200, 100));
     this.action = action || nop;
     this.drawNew();
@@ -561,6 +563,7 @@ function PaintCanvasMorph(shift) {
 }
 
 PaintCanvasMorph.prototype.init = function (shift) {
+    PaintCanvasMorph.uber.init.call(this);
     this.rotationCenter = new Point(240, 180);
     this.dragRect = null;
     this.previousDragPoint = null;
@@ -961,6 +964,7 @@ PaintCanvasMorph.prototype.buildContents = function () {
 };
 
 PaintCanvasMorph.prototype.drawNew = function () {
+    if (!this.background) return;
     var can = newCanvas(this.extent());
     this.merge(this.background, can);
     this.merge(this.paper, can);