Lag compensation for Jermuk's custom cs2d server.

/*include/struct.h
line 72*/
unsigned short buffer_x[26], buffer_y[26];

/*src/functions.c
line 11*/
/**
 * \fn void UpdateBuffer(void)
 * \brief update old player locations
 */
void UpdateBuffer(void)
{
    int id, i;
    if (player[id].dead != 0)
    {
        for (id = 1; id <= MAX_CLIENTS; id++)
        {
            for (i = 25; i >= 1; i--)
            {
                player[id].buffer_x[i] = player[id].buffer_x[i - 1];
                player[id].buffer_y[i] = player[id].buffer_y[i - 1];
            }
            player[id].buffer_x[0] = player[id].x;
            player[id].buffer_y[0] = player[id].y;
        }
    }
}

/*src/functions.c
line 95*/
for (i = 0; i <=25; i++)
{
    player[id].buffer_x[i] = 0;
    player[id].buffer_y[i] = 0;
}

/*src/main.c
line 68*/
UpdateBuffer();

/*src/script-functions.c
line 242*/
int frames = FPS * player[id].latency / 1000;
if (frames > 25)
{
    frames = 25;
}

/*src/script-functions.c
line 292*/
if (sqrt((player[b].buffer_x[frames] - startx)*(player[b].buffer_x[frames] - startx)
        + (player[b].buffer_y[frames] - starty)*(player[b].buffer_y[frames] - starty))
        <= 16)