Compiler warning in stout subcommand tests

../../../../3rdparty/libprocess/3rdparty/stout/tests/subcommand_tests.cpp:146:3: warning: 'delete' applied to a pointer that was allocated with 'new[]'; did you mean 'delete[]'?
[-Wmismatched-new-delete]
delete argv;
^
[]
../../../../3rdparty/libprocess/3rdparty/stout/tests/subcommand_tests.cpp:119:17: note: allocated with 'new[]' here
char** argv = new char*[argc];
^