Fix bug in using wrong type for packsize.

Type of the third argument for MPIR_Pack_size_impl should be a pointer
to MPI_Aint. This patch fixes the wrong usage of int pointer for
MPIR_Pack_size_impl in NEWMAD and MXM netmods.
Signed-off-by: Sangmin Seo <sseo@anl.gov>

src/mpid/ch3/channels/nemesis/netmod/mxm/mxm_poll.c

@@ -482,8 +482,8 @@ static int _mxm_process_rdtype(MPID_Request ** rreq_p, MPI_Datatype datatype,
         *iov_count = n_iov;
     }
     else {
-        int packsize = 0;
-        MPIR_Pack_size_impl(rreq->dev.user_count, rreq->dev.datatype, (MPI_Aint *) & packsize);
+        MPI_Aint packsize = 0;
+        MPIR_Pack_size_impl(rreq->dev.user_count, rreq->dev.datatype, &packsize);
         rreq->dev.tmpbuf = MPIU_Malloc((size_t) packsize);
         MPIU_Assert(rreq->dev.tmpbuf);
         rreq->dev.tmpbuf_sz = packsize;

src/mpid/ch3/channels/nemesis/netmod/newmad/newmad_poll.c

@@ -575,7 +575,7 @@ int MPID_nem_newmad_process_rdtype(MPID_Request **rreq_p, MPID_Datatype * dt_ptr
     }
     else
     {
-	int packsize = 0;
+	MPI_Aint packsize = 0;
 	MPIR_Pack_size_impl(rreq->dev.user_count, rreq->dev.datatype, &packsize);
 	rreq->dev.tmpbuf = MPIU_Malloc((size_t) packsize);
 	MPIU_Assert(rreq->dev.tmpbuf);