gtest-unittest-api_test - fix warning in clang build
gtest-unittest-api_test - fix warning in clang build

gianricardo/googletest,gianricardo/googletest,empiredan/googletest,gianricardo/googletest,empiredan/googletest,antidotcb/googletest,google/googletest,empiredan/googletest,antidotcb/googletest,google/googletest,google/googletest,antidotcb/googletest,google/googletest,antidotcb/googletest