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;
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<div class='path'>path: <a href='/guix/log/?id=610075f7c94c80b8321887b7ccf8bb1a7edd2b8e'>root</a>/<a href='/guix/log/nix?id=610075f7c94c80b8321887b7ccf8bb1a7edd2b8e'>nix</a>/<a href='/guix/log/nix/libutil?id=610075f7c94c80b8321887b7ccf8bb1a7edd2b8e'>libutil</a>/<a href='/guix/log/nix/libutil/util.cc?id=610075f7c94c80b8321887b7ccf8bb1a7edd2b8e'>util.cc</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/nix/libutil/util.cc?id=610075f7c94c80b8321887b7ccf8bb1a7edd2b8e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2015-07-03 00:30:55 +0200'>2015-07-03</span></td><td><a href='/guix/commit/nix/libutil/util.cc?id=322eeb87d0e5bb608ae1c176611a50297c93cbe8'>Merge branch 'nix'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-06-03 22:59:02 +0200'>2015-06-03</span></td><td><a href='/guix/commit/nix/libutil/util.cc?id=54c260e6ecc81f1836bda844ec8e661d51bfb867'>Merge branch 'nix'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-05-19 16:09:58 +0200'>2015-05-19</span></td><td><a href='/guix/commit/nix/libutil/util.cc?id=2bb04905f86f9c3f1d27557fbff8cbdc776560a3'>Merge branch 'nix'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-05-19 16:09:58 +0200'>2015-05-19</span></td><td><a href='/guix/commit/nix/libutil/util.cc?id=a88b8c5c985a87586159c0621974a1dfe5b9b92d'>Revert "daemon: Fix possible use-after-free."</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-05-11 23:01:20 +0200'>2015-05-11</span></td><td><a href='/guix/commit/nix/libutil/util.cc?id=1303a4a4517260def862ce7fe97e6b28dd8005e1'>daemon: Fix possible use-after-free.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>