libuvc: fix undefined behavior caused by capture-by-reference of local variable
libuvc: fix undefined behavior caused by capture-by-reference of local variable

It appears this was introduced in 9d17956c82e79e72f4e12df40bd0f8848bec11a5.
IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense