Fix unintentional draft autosave request if autosave is disabled (#1489882)

CHANGELOG

@@ -19,6 +19,7 @@ CHANGELOG Roundcube Webmail
 - Add configurable LDAP_OPT_DEREF option (#1489864)
 - Optimize some framed pages content for better performance (#1489792)
 - Fix mbox files import
+- Fix unintentional draft autosave request if autosave is disabled (#1489882)
 
 RELEASE 1.0.1
 -------------

program/js/app.js

@@ -3703,12 +3703,13 @@ function rcube_webmail()
 
   this.auto_save_start = function()
   {
-    if (this.env.draft_autosave)
+    if (this.env.draft_autosave) {
       this.draft_autosave_submit = false;
       this.save_timer = setTimeout(function(){
           ref.draft_autosave_submit = true;  // set auto-saved flag (#1489789)
           ref.command("savedraft");
       }, this.env.draft_autosave * 1000);
+    }
 
     // save compose form content to local storage every 5 seconds
     if (!this.local_save_timer && window.localStorage) {