reduced compiler warnings (float init, signed/unsigned compare)

package_bgs/ae/NPBGSubtractor.cpp

package_bgs/bl/SigmaDeltaBGS.cpp

package_bgs/ck/MEImage.cpp

package_bgs/ck/MotionDetection.cpp

package_bgs/db/imbs.cpp

package_bgs/jmo/MultiLayerBGS.cpp

package_bgs/lb/BGModelFuzzyGauss.h

package_bgs/lb/BGModelSom.h

package_bgs/sjn/SJN_MultiCueBGS.cpp

package_bgs/tb/FuzzyChoquetIntegral.cpp

package_bgs/tb/FuzzySugenoIntegral.cpp

package_bgs/tb/MRF.cpp

package_bgs/tb/T2FGMM_UM.cpp

package_bgs/tb/T2FGMM_UV.cpp

package_bgs/tb/T2FMRF.cpp

package_bgs/tb/T2FMRF_UM.cpp

package_bgs/tb/T2FMRF_UV.cpp