The backdrop zoom factor for new node-editor instances was not set (i.e. was default initialised to 0). Now, this gets set to 1.0. Also, set the property default in RNA to match this.
The backdrop zoom factor for new node-editor instances was not set (i.e. was default initialised to 0). Now, this gets set to 1.0. Also, set the property default in RNA to match this.