Skip logging default pad template fallback

This reduces unnecessary logging by not showing the "no template" line
when the `editor` config value is empty (default).

pad.go

@@ -61,7 +61,9 @@ func handleViewPad(app *App, w http.ResponseWriter, r *http.Request) error {
 
 	padTmpl := app.cfg.App.Editor
 	if templates[padTmpl] == nil {
-		log.Info("No template '%s' found. Falling back to default 'pad' template.", padTmpl)
+		if padTmpl != "" {
+			log.Info("No template '%s' found. Falling back to default 'pad' template.", padTmpl)
+		}
 		padTmpl = "pad"
 	}