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/dHWPM_CombBLAS.hpp
+++ b/SRC/dHWPM_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);
     
     /* ------------------------------------------------------------
--- a/SRC/zHWPM_CombBLAS.hpp
+++ b/SRC/zHWPM_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);
     
     /* ------------------------------------------------------------
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<tr><td><span title='2018-08-11 17:22:31 +0200'>2018-08-11</span></td><td><a href='/guix/commit/gnu/packages/license.scm?id=9aba9b127840a116c806a2cbac901cf8077abcd0'>Migrate search.cpan.org home pages to metacpan.org.</a><span class='msg-avail'>...<span class='msg-tooltip'>The venerable search.cpan.org has retired[0].

[0]: https://log.perl.org/2018/05/goodbye-search-dot-cpan-dot-org.html

* guix/import/cpan.scm (cpan-home): Generate metacpan.org home page URIs.
Update all previously generated ones in (gnu packages) to their
canonical new homes.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-04-05 06:39:01 +0200'>2018-04-05</span></td><td><a href='/guix/commit/gnu/packages/license.scm?id=7b3a95e5d401fb7bb9b8a3e9155f04b5fbedbdaa'>gnu: licensecheck: Update to 3.0.34.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/license.scm (licensecheck): Update to 3.0.34.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-02-24 20:01:31 +0300'>2018-02-24</span></td><td><a href='/guix/commit/gnu/packages/license.scm?id=f09cb93e3a2310f7726cb98fa5679c1a8483c39f'>gnu: Add licensecheck.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/license.scm (licensecheck): New public variable.
</span></span></td><td>Oleg Pykhalov</td></tr>
<tr><td><span title='2018-02-24 20:01:30 +0300'>2018-02-24</span></td><td><a href='/guix/commit/gnu/packages/license.scm?id=82e5e0dd52aac659a57bf07ae55e86cd531ea099'>gnu: Add perl-software-license.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/license.scm (perl-software-license): New public variable.
</span></span></td><td>Oleg Pykhalov</td></tr>
<tr><td><span title='2018-02-24 20:01:29 +0300'>2018-02-24</span></td><td><a href='/guix/commit/gnu/packages/license.scm?id=f4e2d9ee6cf49ae7a9ff9a084517c274ea791955'>gnu: Add perl-string-copyright.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/license.scm (perl-string-copyright): New public variable.
</span></span></td><td>Oleg Pykhalov</td></tr>
<tr><td><span title='2018-02-24 20:01:29 +0300'>2018-02-24</span></td><td><a href='/guix/commit/gnu/packages/license.scm?id=d5ee4342c0e62124a6efeb7da4c53c1f69c51d1e'>gnu: Add perl-regexp-pattern-license.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/license.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add this.
</span></span></td><td>Oleg Pykhalov</td></tr>