Reserve if count inserted elements exceeds 3

Слиты xottab-duty запросил слияние github/fork/GermanAizek/reserve-xrgame в dev

Created by: GermanAizek

More effected:

[%] need_to_reserve = (start_compress_buffer_size / sizeof(m_acc_buff.B.data)) + 1 "301 elements" COP zaton level