Fixed bug in TemplateUtil when passed null or undefined values for output.
Fixed bug in TemplateUtil when passed null or undefined values for output.

mdittmer/foam,osric-the-knight/foam,foam-framework/foam,jlhughes/foam,jlhughes/foam,foam-framework/foam,jacksonic/foam,mdittmer/foam,jacksonic/foam,jlhughes/foam,osric-the-knight/foam,jacksonic/foam,jlhughes/foam,foam-framework/foam,jacksonic/foam,mdittmer/foam,osric-the-knight/foam,mdittmer/foam,foam-framework/foam,osric-the-knight/foam,foam-framework/foam