rename get_comm_ptr to lam_comm_lookup

This commit was SVN r303.

src/mca/mpi/ptl/base/ptl_base_match.c

@@ -62,7 +62,7 @@ int mca_ptl_base_match(mca_pml_base_reliable_hdr_t *frag_header,
     *match_made=0;
 
     /* communicator pointer */
-	comm_ptr=get_comm_ptr(frag_header->hdr_base.hdr_contextid);
+    comm_ptr=lam_comm_lookup(frag_header->hdr_base.hdr_contextid);
     pml_comm=(mca_pml_comm_t *)comm_ptr->c_pml_comm;
 
     /* source sequence number */