Fix compilation with TRACE_API
Fix compilation with TRACE_API

error: return type 'nullptr_t' must match previous return type 'rs2_raw_data_buffer *' when lambda expression has unspecified explicit return type

IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense