Print the string name of the return code

This commit was SVN r7789.

ompi/runtime/help-mpi-runtime.txt

@@ -25,7 +25,7 @@ additional information (which may only be relevant to an Open MPI
 developer):
 
   %s
-  --> Returned value %d instead of OMPI_SUCCESS
+  --> Returned "%s" (%d) instead of "Success" (0)
 [mpi-param-check-enabled-but-compiled-out]
 WARNING: The MCA parameter mpi_param_check has been set to true, but
 parameter checking has been compiled out of Open MPI.  The

ompi/runtime/ompi_mpi_init.c

@@ -492,9 +492,10 @@ int ompi_mpi_init(int argc, char **argv, int requested, int *provided)
 
  error:
     if (ret != OMPI_SUCCESS) {
+        const char *err_msg = opal_strerror(ret);
         opal_show_help("help-mpi-runtime",
                        "mpi_init:startup:internal-failure", true,
-                       "MPI_INIT", "MPI_INIT", error, ret);
+                       "MPI_INIT", "MPI_INIT", error, err_msg, ret);
         return ret;
     }