Create the CombBLAS::SpParMat with the MPI_Comm from the input 'gridinfo_t'.
This prevents a warning/error from CombBLAS about using MPI_COMM_WORLD.

--- a/SRC/AWPM_CombBLAS.hpp
+++ b/SRC/AWPM_CombBLAS.hpp
@@ -52,7 +52,7 @@
     {
         printf("AWPM only supports square process grid. Retuning without a permutation.\n");
     }
-    combblas::SpParMat < int_t, double, combblas::SpDCCols<int_t,double> > Adcsc;
+    combblas::SpParMat < int_t, double, combblas::SpDCCols<int_t,double> > Adcsc(grid->comm);
     std::vector< std::vector < std::tuple<int_t,int_t,double> > > data(procs);
     
     /* ------------------------------------------------------------
@@ -100,11 +100,10 @@
     combblas::AWPM(Adcsc, mateRow2Col, mateCol2Row,true);
     
     // now gather the matching vector
-    MPI_Comm World = mateRow2Col.getcommgrid()->GetWorld();
     int * rdispls = new int[procs];
     int sendcnt = mateRow2Col.LocArrSize();
     int * recvcnt = new int[procs];
-    MPI_Allgather(&sendcnt, 1, MPI_INT, recvcnt, 1, MPI_INT, World);
+    MPI_Allgather(&sendcnt, 1, MPI_INT, recvcnt, 1, MPI_INT, grid->comm);
     rdispls[0] = 0;
     for(int i=0; i<procs-1; ++i)
     {
@@ -112,7 +111,7 @@
     }
     int_t *senddata = (int_t *)mateRow2Col.GetLocArr();
     
-    MPI_Allgatherv(senddata, sendcnt, combblas::MPIType<int_t>(), ScalePermstruct->perm_r, recvcnt, rdispls, combblas::MPIType<int_t>(), World);
+    MPI_Allgatherv(senddata, sendcnt, combblas::MPIType<int_t>(), ScalePermstruct->perm_r, recvcnt, rdispls, combblas::MPIType<int_t>(), grid->comm);
     
     delete[] rdispls;
     delete[] recvcnt;