Merge pull request #1496 from rachel-fenichel/bugfix/1467

Fix #1467

core/field_image.js

@@ -175,6 +175,13 @@ Blockly.FieldImage.prototype.render_ = function() {
   // NOP
 };
 
+/**
+ * Images are fixed width, no need to render even if forced.
+ */
+Blockly.FieldImage.prototype.forceRerender = function() {
+  // NOP
+};
+
 /**
  * Images are fixed width, no need to update.
  * @private