Fixed cppcheck warnings in GeoModelXml

...odelXML/GeoModelXml/GeoModelXml/Element2GeoItemRegistry.h

GeoModelTools/GeoModelXML/GeoModelXml/GeoModelXml/Gmx2Geo.h

...lTools/GeoModelXML/GeoModelXml/GeoModelXml/GmxInterface.h

...Tools/GeoModelXML/GeoModelXml/GeoModelXml/PositionIndex.h

...s/GeoModelXML/GeoModelXml/GeoModelXml/ProcessorRegistry.h

...s/GeoModelXML/GeoModelXml/src/Element2GeoItemRegistry.cxx

GeoModelTools/GeoModelXML/GeoModelXml/src/Gmx2Geo.cxx

GeoModelTools/GeoModelXML/GeoModelXml/src/GmxInterface.cxx

...delTools/GeoModelXML/GeoModelXml/src/MakeIntersection.cxx

...odelTools/GeoModelXML/GeoModelXml/src/MakeSubtraction.cxx

GeoModelTools/GeoModelXML/GeoModelXml/src/MakeUnion.cxx

GeoModelTools/GeoModelXML/GeoModelXml/src/PositionIndex.cxx

...elTools/GeoModelXML/GeoModelXml/src/ProcessorRegistry.cxx