avoid various warnings

[[Imported from SVN: r3229]]

dune/solvers/iterationsteps/blockgsstep.cc

@@ -38,7 +38,7 @@ void BlockGSStep<OperatorType, DiscFuncType, BitVectorType>::iterate()
 {
     const OperatorType& mat = *this->mat_;
 
-    for (int i=0; i<this->x_->size(); i++) {
+    for (size_t i=0; i<this->x_->size(); i++) {
 
         /** \todo Handle more general boundary conditions */
         if ((*this->ignoreNodes_)[i][0]) {

dune/solvers/iterationsteps/projectedblockgsstep.cc

@@ -15,7 +15,7 @@ void ProjectedBlockGSStep<OperatorType, DiscFuncType>::iterate()
 
     const OperatorType& mat = *this->mat_;
 
-    for (int i=0; i<this->x_->size(); i++) {
+    for (size_t i=0; i<this->x_->size(); i++) {
 
         /** \todo Handle more general boundary conditions */
         if ((*this->ignoreNodes_)[i][0])

dune/solvers/iterationsteps/trustregiongsstep.cc

@@ -8,7 +8,7 @@ DiscFuncType TrustRegionGSStep<OperatorType, DiscFuncType>::getSol()
 template<class OperatorType, class DiscFuncType>
 inline 
 double TrustRegionGSStep<OperatorType, DiscFuncType>::
-residual(int index, int blockIndex) const
+residual(unsigned int index, int blockIndex) const
 {
     const OperatorType& mat = *this->mat_;
 
@@ -53,7 +53,7 @@ void TrustRegionGSStep<OperatorType, DiscFuncType>::iterate()
     //std::cout << "----------------------------------\n";
     //double oldEnergy = computeEnergy(mat, *this->x_, *this->rhs_);
 
-    for (int i=0; i<this->x_->size(); i++) {
+    for (size_t i=0; i<this->x_->size(); i++) {
 
         // scalar gauss-seidel
         for (int j=0; j<blocksize; j++) {

dune/solvers/iterationsteps/trustregiongsstep.hh

@@ -37,7 +37,7 @@
 
         virtual DiscFuncType getSol();
 
-        double residual(int index, int blockIndex) const;
+        double residual(unsigned int index, int blockIndex) const;
 
     };
 

dune/solvers/solvers/loopsolver.cc

@@ -56,7 +56,7 @@ void ::LoopSolver<VectorType, BitVectorType>::solve()
             std::cout << "---------------";
         std::cout << "---------------";
         std::cout << "---------";
-        for(int i=0; i<header.size(); ++i)
+        for(size_t i=0; i<header.size(); ++i)
             std::cout << "-";
         std::cout << std::endl;
     }