* jvmti.cc (THREAD_DEFAULT_TO_CURRENT): Encapsulate in do..while loop.

        (THREAD_CHECK_VALID): Likewise.
        (THREAD_CHECK_IS_ALIVE): Likewise.
        (NULL_CHECK): Likewise.
        (ILLEGAL_ARGUMENT): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@116636 138bc75d-0d04-0410-961f-82ee72b054a4