From: Lukas Korous <lukas.korous@gmail.com>
Date: Sun, 30 Oct 2016 12:13:06 +0000 (+0100)
Subject: Small fixes.
X-Git-Tag: v8.5.0-rc1~521^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7775be7b663c1d821b60ed306593fb46989c1b05;p=dealii.git

Small fixes.
---

diff --git a/include/deal.II/lac/trilinos_sparsity_pattern.h b/include/deal.II/lac/trilinos_sparsity_pattern.h
index aaee461a1d..856c3bb29e 100644
--- a/include/deal.II/lac/trilinos_sparsity_pattern.h
+++ b/include/deal.II/lac/trilinos_sparsity_pattern.h
@@ -53,6 +53,7 @@ namespace TrilinosWrappers
 {
   // forward declarations
   class SparsityPattern;
+  class SparseMatrix;
 
   namespace SparsityPatternIterators
   {
@@ -1164,7 +1165,7 @@ namespace TrilinosWrappers
      */
     std_cxx11::shared_ptr<Epetra_CrsGraph> nonlocal_graph;
 
-    friend class SparseMatrix;
+    friend class TrilinosWrappers::SparseMatrix;
     friend class SparsityPatternIterators::Accessor;
     friend class SparsityPatternIterators::Iterator;
   };
diff --git a/source/base/utilities.cc b/source/base/utilities.cc
index dfdcd89364..66055ba1ab 100644
--- a/source/base/utilities.cc
+++ b/source/base/utilities.cc
@@ -132,7 +132,7 @@ namespace Utilities
   trim(const std::string &input)
   {
     std::string::size_type left = 0;
-    std::string::size_type right = input.size() - 1;
+    std::string::size_type right = input.size() > 0 ? input.size() - 1 : 0;
 
     for (; left < input.size(); ++left)
       {