Fixed RTP port management routine to allocate ports within the specified range, even if the range contains odd number of ports. (Issue #182)
Fixed RTP port management routine to allocate ports within the specified range, even if the range contains odd number of ports. (Issue #182)

For example: [5000, 5010) is equal to [5000, 5009], where both contain 5 pairs of RTP/RTCP ports.

unispeech/unimrcp,unispeech/unimrcp,unispeech/unimrcp