[MPICH] Small notice on HAVE_TIMER

[Calin Iaru]

Hi all,

    when compiling MPICH2.vcproj, by default HAVE_TIMER and USE_LOGGING 
have assigned some values. I think it's best that all checks like #ifdef 
HAVE_TIMER should be expanded to #if defined (HAVE_TIMER) && HAVE_TIMER 
!= MPID_TIMER_KIND_NONE
    Compiling with -DUSE_LOGGING=HAVE_LOGGING_NONE 
-DHAVE_TIMER=MPID_TIMER_KIND_NONE results in error.

Best regards,
    Calin