Fix typo

This commit was SVN r7040.

ompi/runtime/help-mpi-runtime.txt

@@ -30,7 +30,7 @@ developer):
 WARNING: The MCA parameter mpi_param_check has been set to true, but
 parameter checking has been compiled out of Open MPI.  The
 mpi_param_check value has therefore been ignored.
-[mpi_init:statup:paffinity-unavailable]
+[mpi_init:startup:paffinity-unavailable]
 The MCA parameter "mpi_paffinity_alone" was set to a nonzero value,
 but Open MPI was unable to bind MPI_COMM_WORLD rank %s to a processor.