Wstringop-overflow warning fix in bio inspired module

[asmorkalov]

Fixes GCC 11 warning (ubuntu 22.04):

2102/3265] Building CXX object modules/bioinspired/CMakeFiles/opencv_bioinspired.dir/src/transientareassegmentationmodule.cpp.o
In file included from /usr/include/string.h:535,
                 from /usr/include/c++/11/cstring:42,
                 from /home/ci/opencv/modules/core/include/opencv2/core/cvstd.hpp:53,
                 from /home/ci/opencv/modules/core/include/opencv2/core/base.hpp:58,
                 from /home/ci/opencv/modules/core/include/opencv2/core.hpp:53,
                 from /home/ci/opencv_contrib/modules/bioinspired/include/opencv2/bioinspired.hpp:46,
                 from /home/ci/opencv_contrib/modules/bioinspired/src/precomp.hpp:47,
                 from /home/ci/opencv_contrib/modules/bioinspired/src/transientareassegmentationmodule.cpp:77:
In function 'void* memcpy(void*, const void*, size_t)',
    inlined from 'void cv::bioinspired::TransientAreasSegmentationModuleImpl::setup(cv::bioinspired::SegmentationParameters)' at /home/ci/opencv_contrib/modules/bioinspired/src/transientareassegmentationmodule.cpp:359:11,
    inlined from 'cv::bioinspired::TransientAreasSegmentationModuleImpl::TransientAreasSegmentationModuleImpl(cv::Size)' at /home/ci/opencv_contrib/modules/bioinspired/src/transientareassegmentationmodule.cpp:269:10:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:29:33: warning: writing 32 bytes into a region of size 4 [-Wstringop-overflow=]

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