Lots of minor fixes following cppcheq recommendations

App/inc/TestToyExperiment.h

App/src/DrawHelper.cpp

App/src/FunctionalTestFactory.cpp

App/src/IsGISAXSTools.cpp

App/src/TestFumiliLMA.cpp

App/src/TestIsGISAXS12.cpp

App/src/TestIsGISAXS2.cpp

App/src/TestIsGISAXS3.cpp

App/src/TestIsGISAXS4.cpp

App/src/TestIsGISAXS8.cpp

App/src/TestIsGISAXS9.cpp

App/src/TestPerformance.cpp

App/src/TestToyExperiment.cpp

Core/Algorithms/src/ChiSquaredFrequency.cpp

Core/Algorithms/src/GISASExperiment.cpp

Core/Algorithms/src/MaskCoordinateFunction.cpp

Core/Algorithms/src/MultiLayerDWBASimulation.cpp

Core/Geometry/inc/BasicVector3D.h

Core/Samples/inc/ICompositeIterator.h

Core/Samples/src/Crystal.cpp