bug#76448: [PATCH] automake: add missing AC_MSG_RESULT calls to AM_SANITY_CHECK

[Karl Berry]

    * m4/sanity.m4 (AM_SANITY_CHECK): Call AC_MSG_RESULT before erroring
    out so that a complete line is printed to stdout before the error
    message is written to stderr.

I pushed this. (surprisingly, no tests failed for me. :)
Thanks Richard.