Fix Wsign-compare warning

diff --git a/source/lac/sparsity_tools.cc b/source/lac/sparsity_tools.cc
index fd450bd6593f99b41bd593ecb78d05852aa1233b..995cdf7a0bc1b615147682ee05b73d9d4a64983a 100644 (file)
--- a/source/lac/sparsity_tools.cc
+++ b/source/lac/sparsity_tools.cc
@@ -182,7 +182,7 @@ namespace SparsityTools
 
       Assert ( numEdges != nullptr , ExcInternalError() );
 
-      for (unsigned int i=0; i<num_obj; ++i)
+      for (int i=0; i<num_obj; ++i)
         numEdges[i] = graph->row_length(globalID[i])-1;
     }