The logic for allocating receive buffer is complex and can be optimized

In the code file: core/sqf/src/tm/tm.cpp

In the function definition of line 2788, there are two buffer definitions, la_recv_buffer and la_recv_buffer_ddl. Maybe we can avoid dynamically assigning la_recv_buffer_ddl. It is enough to use only la_recv_buffer, which simplifies the logic and reduces the heap pressure.