[svn] 4606: Make policy-file-url optional via the ant task.

Revision: 4606
Author: gauravj@adobe.com
Date: 2009-01-21 09:44:27 -0800 (Wed, 21 Jan 2009)

Log Message:
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Make policy-file-url optional via the ant task.

The policy-file-url - takes a empty sting from the command line to separate two urls.

QE Notes: None
Doc Notes: None
Bugs: SDK-18401
tests: checkintests

Ticket Links:
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http://bugs.adobe.com/jira/browse/SDK-18401

Modified Paths:
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flex/sdk/branches/3.x/modules/antTasks/src/flex/ant/types/URLElement.java