fix global_timestamp_reader to make first time request from device sooner. Reduces number of frame requests receiving Hardware timestamp instead of global timestamp.
fix global_timestamp_reader to make first time request from device sooner. Reduces number of frame requests receiving Hardware timestamp instead of global timestamp.

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