Fixed img and img::alg unittests for windows

cmake_support/OST.cmake

modules/img/alg/tests/test_filter.cc

modules/img/alg/tests/test_utils.hh

modules/img/alg/tests/tests.hh

modules/img/base/src/function_base.hh

modules/img/base/src/image_state/image_state_visitor.hh

modules/img/base/src/null_function.hh

modules/img/base/src/observable.hh

modules/img/base/tests/CMakeLists.txt

modules/img/base/tests/test_data.hh

modules/img/base/tests/test_domains.cc

modules/img/base/tests/test_extent.hh

modules/img/base/tests/test_function.hh

modules/img/base/tests/test_image.hh

modules/img/base/tests/test_image_factory.hh

modules/img/base/tests/test_image_impl.hh

modules/img/base/tests/test_image_state.hh

modules/img/base/tests/test_image_state_visitor.hh

modules/img/base/tests/test_index.hh

modules/img/base/tests/test_point.hh