QSafeTextLayout::SetText boundary check does not take null terminator into account

void QSafeTextLayout::setText(const qchar * const textArg)
{
    const size_t length = safe_strlen(textArg);
    memset(&m_text[0U], 0, sizeof(m_text));
    if (Constraints::MAX_LEN_OF_TEXT < length) {
        throw QSafeTextLayoutException(QSafeTextLayoutException::InvalidText, "Text is too long");
    } else if (length > 0U) {
        // AXIVION Next Line MisraC++-5.2.12: Unavoidable array to pointer decay. Manually verified to be ok.
        strncpy(m_text, textArg, length);
    } else {
        //Empty string
    }} 

size_t safe_strlen(const qchar *const strArg, size_t maxLen)
{
    quint32 len = 0U;
    if (strArg != NULL) {
        while (strArg[len] != '\0' && len < maxLen) {
            ++len;
        }
    }
    return len;
}