CRM-13459 fix : added additional filter of entity_table = 'civicrm_pcp'

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* CRM-13459: PCP Image does not display correct image
  http://issues.civicrm.org/jira/browse/CRM-13459
Merge pull request #1703 from pratik-joshi/CRM-13459

CRM-13459 fix : added additional filter of entity_table = 'civicrm_pcp'