fixed a few compilation warnings

GaudiExamples/CMakeLists.txt

GaudiExamples/src/AlgTools/MyGaudiAlgorithm.h

GaudiExamples/src/ExtendedProperties/ArrayProperties.cpp

GaudiExamples/src/ExtendedProperties/ExtendedProperties.cpp

GaudiHive/CMakeLists.txt

GaudiHive/src/CPUCruncher.h

GaudiHive/src/ExecutionFlowGraph.h

GaudiHive/src/ForwardSchedulerSvc.h

GaudiHive/src/HiveSlimEventLoopMgr.cpp

GaudiKernel/GaudiKernel/CArrayAsProperty.h

GaudiKernel/GaudiKernel/PropertyList.h

GaudiKernel/GaudiKernel/UpdateManagerException.h

GaudiKernel/tests/src/test_headers_build.cpp

GaudiPython/dict/selection_kernel.xml

PartPropSvc/CMakeLists.txt

RootCnv/RootCnv/RootCnvSvc.h