strict warning fixes CRM-14944

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* CRM-14944: function should not be called statically - pledge page
  https://issues.civicrm.org/jira/browse/CRM-14944
CRM-14944 QA fixes

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* CRM-14944: function should not be called statically - pledge page
  https://issues.civicrm.org/jira/browse/CRM-14944