Bugfix: Export pac from a FixedProfile without bypass list do not work.

If a fixedProfle without any bypass list, pac generation will fail. This cause
export pac failure, and switch profile which refer to this fixedprofile also not
work properly.

omega-pac/src/profiles.coffee

@@ -253,7 +253,7 @@ module.exports = exports =
         body = [
           new U2.AST_Directive value: 'use strict'
         ]
-        if profile.bypassList
+        if profile.bypassList and profile.bypassList.length
           conditions = null
           for cond in profile.bypassList
             condition = Conditions.compile cond