diff -r 68792fb2870f -r e4554cd6b2bf lemon/lp_skeleton.cc
--- a/lemon/lp_skeleton.cc	Fri Oct 02 17:03:43 2009 +0200
+++ b/lemon/lp_skeleton.cc	Sun Oct 04 00:28:42 2009 +0200
@@ -32,6 +32,11 @@
     return ++row_num;
   }
 
+  int SkeletonSolverBase::_addRow(Value, ExprIterator, ExprIterator, Value)
+  {
+    return ++row_num;
+  }
+
   void SkeletonSolverBase::_eraseCol(int) {}
   void SkeletonSolverBase::_eraseRow(int) {}