fix the case where we reduce to 1 domain

diff --git a/source/lac/sparsity_tools.cc b/source/lac/sparsity_tools.cc
index 813c4edd33e0319eea8767c8404dcbcf989c1288..05ac8aa848bffbd7d1b7abd4fdc73882dfde5961 100644 (file)
--- a/source/lac/sparsity_tools.cc
+++ b/source/lac/sparsity_tools.cc
@@ -57,7 +57,7 @@ namespace SparsityTools
                                  sparsity_pattern.n_rows()));
 
     // check for an easy return
-    if (n_partitions == 1)
+    if (n_partitions == 1 || (sparsity_pattern.n_rows()==1))
       {
         std::fill_n (partition_indices.begin(), partition_indices.size(), 0U);
         return;