Fixed another potential crash of client stack (leftover from previous fix).
Fixed another potential crash of client stack (leftover from previous fix).

Pending session termination request should not be canceled even if termination event is received.

unispeech/unimrcp,AaronZhangL/unimrcp-1,unispeech/unimrcp,AaronZhangL/unimrcp-1,unispeech/unimrcp,AaronZhangL/unimrcp-1