CRM-14367 - Fix fatal error due to 5.3 vs 5.4 php reqs, and tweak warning msg.

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* CRM-14367:
  https://issues.civicrm.org/jira/browse/CRM-14367
Merge pull request #3301 from davecivicrm/CRM-14367

CRM-14367 - Fix fatal error due to 5.3 vs 5.4 php reqs, and tweak warnin...