Undefined variable $text_processing in editor_note_field_validate()

Problem/Motivation

When saving content with a note PHP will log the error:

Warning: Undefined variable $text_processing in editor_note_field_validate() (line 755 of editor_note/editor_note.module).

Steps to reproduce

Create or edit content and add a Editor Note. Save the content and the error will appear.

Proposed resolution

$text_processing should be declared early in the editor_note_field_validate() function with the value FALSE.