Index: graphics.h.in
===================================================================
RCS file: /cvs/octave/src/graphics.h.in,v
retrieving revision 1.52
diff -u -r1.52 graphics.h.in
--- graphics.h.in	2 Feb 2008 07:56:53 -0000	1.52
+++ graphics.h.in	2 Feb 2008 16:31:22 -0000
@@ -187,6 +187,8 @@
 public:
   base_scaler (void) { }
 
+  virtual ~base_scalar (void) { }
+
   virtual Matrix scale (const Matrix& m) const
     {
       error ("invalid axis scale");
Index: graphics.cc
===================================================================
RCS file: /cvs/octave/src/graphics.cc,v
retrieving revision 1.81
diff -u -r1.81 graphics.cc
--- graphics.cc	1 Feb 2008 06:47:48 -0000	1.81
+++ graphics.cc	2 Feb 2008 16:31:23 -0000
@@ -1901,7 +1901,7 @@
   normalize (f);
   normalize (UP);
 
-  if (abs (dot (f, UP)) > 1e-15)
+  if (std::abs (dot (f, UP)) > 1e-15)
     {
       double fa = 1/sqrt(1-f(2)*f(2));
       scale (UP, fa, fa, fa);