0021791: The physical keyboard cannot be used to lock the screen

diff -r 0031abdee497 web/org.openbravo.retail.posterminal/js/components/keyboard.js
--- a/web/org.openbravo.retail.posterminal/js/components/keyboard.js	Thu Dec 06 12:56:59 2012 +0100
+++ b/web/org.openbravo.retail.posterminal/js/components/keyboard.js	Thu Dec 06 17:42:20 2012 +0100
@@ -289,7 +289,11 @@
       return;
     }
     if (which === 13 && this.$.editbox.getContent()) { //Handle ENTER key if there is something in the display
-      if (this.defaultcommand) {
+      if (this.$.editbox.getContent() === '0') {
+        this.doCommandFired({
+          key: "OK"
+        });
+      } else if (this.defaultcommand) {
         this.execCommand(this.commands[this.defaultcommand], this.getString());
       } else {
         OB.UTIL.showWarning(OB.I18N.getLabel('OBPOS_NoDefaultActionDefined'));