• int MLFlush(MLINK link) flushes out any buffers containing data waiting to be sent on link.
• If you call MLNextPacket() or any of the MLGet*() functions, then MLFlush() will be called automatically.
• If you call MLReady(), then you need to call MLFlush() first in order to ensure that any necessary outgoing data has been sent.
• See Section 2.13.14.
• See also: MLReady.