Fix warning in tests on PHP5.2.3 < . Avoid test for call_if_exists with static class method call.
Fix warning in tests on PHP5.2.3 < . Avoid test for call_if_exists with static class method call.

emonzain/PiProcessors,ulimartinez/hackdfw,ulimartinez/hackdfw,ulimartinez/hackdfw,emonzain/PiProcessors,dateutli/hackdfw,ulimartinez/hackdfw,emonzain/PiProcessors,dpcf/limonade,jnadaud/limonade,sofadesign/limonade,dateutli/hackdfw,dateutli/hackdfw,dateutli/hackdfw