Remove compiler warnings and fix compile error

CMakeLists.txt

applications/gui2/src/modules/calibration.cpp

applications/vision/src/main.cpp

components/audio/src/software_decoder.cpp

components/audio/src/software_encoder.cpp

components/codecs/src/depth_convert.cu

components/codecs/src/nvidia_encoder.cpp

components/codecs/test/opencv_codec_unit.cpp

components/common/cpp/test/msgpack_unit.cpp

components/rgbd-sources/include/ftl/rgbd/source.hpp

components/rgbd-sources/src/source.cpp

components/streams/src/sender.cpp