message: MeanPtV2 compiling only with ROOT6 from here on
diff: @@ -42,7 +42,6 @@ set(SRCS
  AliAnalysisTaskFlowExample.cxx
  AliAnalysisTaskGFWFlow.cxx
  AliAnalysisTaskGFWPIDFlow.cxx
  - AliAnalysisTaskMeanPtV2Corr.cxx
  AliAnalysisTaskUniFlow.cxx
  AliAnalysisTaskUniFlowWithSphericity.cxx
  AliAnalysisTaskUniFlowMultiStrange.cxx
  @@ -62,6 +61,7 @@ set(SRCS
  )
  if(${ROOT_VERSION} GREATER_EQUAL 6.0)
  + list(APPEND SRCS AliAnalysisTaskMeanPtV2Corr.cxx)
  list(APPEND SRCS AliAnalysisTaskNonlinearFlow.cxx)
  list(APPEND SRCS CorrelationCalculator.cxx)
  endif()
  