WRG: unused variable and uninitialized variable warnings corrected

Applications/DisparityMap/otbGeneratePlyFile.cxx

Code/Common/otbMacro.h

Code/Common/otbParser.cxx

Code/DisparityMap/otbDisparityTranslateFilter.txx

Code/FeatureExtraction/otbImageToSIFTKeyPointSetFilter.txx

Code/FeatureExtraction/otbNonMaxRemovalByDirectionFilter.h

Code/OBIA/otbLabelObjectToPolygonFunctor.txx

Code/UtilitiesAdapters/CurlAdapters/otbCurlHelper.cxx