[3.2] fix break strict-aliasing rules warnings in get_table_tests.cpp

[linh2931]

Resolved #631.

Fixed following warnings:

.../tests/get_table_tests.cpp: In member function ‘void get_table_tests::get_table_next_key_test::test_method()’:
.../tests/get_table_tests.cpp:584:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  584 |    BOOST_CHECK(*reinterpret_cast<float64_t*>(&secdouble_res_value) == secdouble_expected_value);
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.../tests/get_table_tests.cpp:591:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  591 |    BOOST_CHECK(*reinterpret_cast<float64_t*>(&more2_secdouble_res_value) == more2_secdouble_expected_value);/home/lh/work/warning/tests/get_table_tests.cpp: In member function ‘void get_table_tests::get_table_next_key_test::test_method()’:
.../tests/get_table_tests.cpp:584:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  584 |    BOOST_CHECK(*reinterpret_cast<float64_t*>(&secdouble_res_value) == secdouble_expected_value);
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.../tests/get_table_tests.cpp:591:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  591 |    BOOST_CHECK(*reinterpret_cast<float64_t*>(&more2_secdouble_res_value) == more2_secdouble_expected_value);