[svn-r3296] Added message about number of reqs in unexpected buffer when we fail to allocate a request for an unexpected message.  This is a more informative message so the user can see why a request was unable to be allocated.

[svn-r3271] Committing the 64-bit optimization code for queue searching. This should make queue searches for the posted queue and the unexpected queue considerably faster for large queue lengths. Reviewed by
buntinas.

[svn-r3070] Added ATTRIBUTE((unused)) (which is defined to work with gcc and disappear for other compilers only to the functions whose arguments are defined by a general pattern (such as a request handler) and thus must be used even if not needed.  For functions that have parameters that are not used and are not needed to conform to a pattern, do not use ATTRIBUTE((unused)), instead, fix the routine to either make use of the argument in a real way or change the routine to not pass the argument.

[svn-r477] Initializing some additional variables during their declaration. This doesn't hurt MPICH2, but eases OSU's MVAPICH2 integration.