[from mpich] romio GPFS: missing initialization

Merging a romio commit that was accepted by mpich:

> romio GPFS: missing initialization
>
> Romio GPFS had a runtime problem due to a .mem_ptrs field that
> was uninitialized that it was potentially trying to free.

Signed-off-by: Mark Allen <[email protected]>

Author: markalle

ompi/mca/io/romio321/romio/adio/ad_gpfs/ad_gpfs_aggrs.c

@@ -719,6 +719,7 @@ void ADIOI_GPFS_Calc_others_req(ADIO_File fd, int count_my_req_procs,
 	    others_req[i].count = 0;
 	    others_req[i].offsets = NULL;
 	    others_req[i].lens    = NULL;
+	    others_req[i].mem_ptrs = NULL;
 	}
     }