Memory leak in Add_Entry

[xezon]

int Move_Rows_Down(_ListboxData *data, int row)
{
    int size = sizeof(_ListEntryRow) * (data->m_endPos - row);
    char *buf = new char[size];
    memcpy(buf, &data->m_listData[row], size);
    memcpy(&data->m_listData[row + 1], buf, size);
    delete[] buf;
    data->m_insertPos = ++data->m_endPos;
    data->m_listData[row].m_cell = 0;
    data->m_listData[row].m_height = 0;
    data->m_listData[row].m_listHeight = 0;

    if (data->m_multiSelect) {
        for (int i = 0; data->m_selections[i] >= 0; i++) {
            if (row <= data->m_selections[i]) {
                data->m_selections[i]++;
            }
        }
    } else if (data->m_selectPos >= row) {
        data->m_selectPos++;
    }

    return 1;
}

int Add_Entry(Utf16String *string, int color, int row, int column, GameWindow *list_box, bool overwrite)
{
...
        _ListEntryRow *list_row = &data->m_listData[row];

        if (list_row->m_cell != nullptr) {
            if (!overwrite) {
                Move_Rows_Down(data, row);
                list_row->m_cell = new _ListEntryCell[data->m_columns];
                memset(list_row->m_cell, 0, sizeof(_ListEntryCell) * data->m_columns);
                adjust = 1;
            }

Add_Entry does list_row->m_cell = new _ListEntryCell[data->m_columns];. There are no deletes prior, so this looks like memory leak at this point.