Fix array out of range when too many line segments extracted

[LeatherWang]

When extracted line segments number over given size of lines.sId(default: 5 * edges.numOfEdges), it will result in array out of range, which further cause a segment fault as below. This is a small probability event, but it did happen in practical use.

*** Aborted at 1641264940 (unix time) try "date -d @1641264940" if you are using GNU date ***
PC: @                0x0 (unknown)
*** SIGABRT (@0x3e800001cc8) received by PID 7368 (TID 0x7ff538ff8700) from PID 7368; stack trace: ***
    @     0x7ff56ff71390 (unknown)
    @     0x7ff56e57e428 gsignal
    @     0x7ff56e58002a abort
    @     0x7ff56e5c07ea (unknown)
    @     0x7ff56e5c79dc (unknown)
    @     0x7ff56e5c9678 (unknown)
    @     0x7ff56e5cd53c cfree
    @     0x7ff56fb2787d cv::line_descriptor::BinaryDescriptor::EDLineDetector::~EDLineDetector()
    @     0x7ff56fb3386a cv::detail::PtrOwnerImpl<>::deleteSelf()
    @     0x7ff56fb25ffb cv::line_descriptor::BinaryDescriptor::~BinaryDescriptor()
    @     0x7ff56fb26059 cv::line_descriptor::BinaryDescriptor::~BinaryDescriptor()
    @     0x7ff56fb33453 cv::detail::PtrOwnerImpl<>::deleteSelf()

[alalek]

please use .push_back as 3.4 branch doesn't have C++11 requirement (should support C++98)

[LeatherWang]

OK, done.

[alalek]

Thank you 👍