Hotfix for issues with dsuperlu in regression test. (#631)

Commented out unnecessary memory deallocation check.

src/parcsr_ls/dsuperlu.c

@@ -52,7 +52,7 @@ HYPRE_Int hypre_SLUDistSetup( HYPRE_Solver *solver, hypre_ParCSRMatrix *A, HYPRE
    hypre_MPI_Comm_rank(comm, &my_id);
 
    /* destroy solver if already setup */
-   if (solver != NULL) { hypre_SLUDistDestroy(solver); }
+//   if (solver != NULL) { hypre_SLUDistDestroy(solver); }
    /* allocate memory for new solver */
    dslu_data = hypre_CTAlloc(hypre_DSLUData, 1, HYPRE_MEMORY_HOST);