-- CRM-12771 fix

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* CRM-12771: contribution pages with a zero amount are not generating receipts or creating contribution records
  http://issues.civicrm.org/jira/browse/CRM-12771
-- CRM-12771 offline contribution page break fix

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* CRM-12771: contribution pages with a zero amount are not generating receipts or creating contribution records
  http://issues.civicrm.org/jira/browse/CRM-12771
-- CRM-12771 some more fixes

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* CRM-12771: contribution pages with a zero amount are not generating receipts or creating contribution records
  http://issues.civicrm.org/jira/browse/CRM-12771
Merge pull request #987 from ravishnair/CRM-12771fix

CRM-12771 fix