Use MPIDI_msg_sz_t instead of int for orig_segment_first.

Here we assign req->dev.segment_first to orig_segment_first.
Since req->dev.segment_first is a MPIDI_msg_sz_t type, we should
use the same type for orig_segment_first.
Signed-off-by: Pavan Balaji <balaji@anl.gov>

src/mpid/ch3/channels/nemesis/src/ch3i_eagernoncontig.c

@@ -22,7 +22,7 @@ int MPIDI_CH3I_SendNoncontig( MPIDI_VC_t *vc, MPID_Request *sreq, void *header,
 {
     int mpi_errno = MPI_SUCCESS;
     int again = 0;
-    int orig_segment_first = sreq->dev.segment_first;
+    MPIDI_msg_sz_t orig_segment_first = sreq->dev.segment_first;
     MPIDI_STATE_DECL(MPID_STATE_MPIDI_CH3I_SENDNONCONTIG);
 
     MPIDI_FUNC_ENTER(MPID_STATE_MPIDI_CH3I_SENDNONCONTIG);