Help with GtkCurve!!

[Carlos Alberto Llano Rodriguez <carlos_llano_rodriguez yahoo com>]

I have a problem and is that have a vector of points
that they describe me a curve, that vector itself it
step al GtkCurve the paints it but leaves it in free
type (GTK_CURVE_TYPE_FREE), what I need is that the
 
 Too many errors encountered; the rest of the message
is ignored:
 GtkCurve paint it and leave it in lineal way
 (GTK_CURVE_TYPE_LINEAR).
 
 The codigo is the following one:
 
 #include <stdlib.h
 #include <string.h
 
 
 gint close_application( GtkWidget *widget, 
                       GdkEvent  *event, 
                       gpointer   data )
 {
   gtk_main_quit();
   return(FALSE);
 }//close_application
 
 
 
 
 int main( int   argc, char *argv[] )
 {
   GtkWidget *window, *curve;
 
   int count = 0;
   gfloat vec[256];
   gint max;
   gint i;
 
   /**
    * Create editor window
    */
   gtk_init( &argc, &argv );
   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
   gtk_window_set_title (GTK_WINDOW (window), 
                       "GtkCurve Test");
   gtk_signal_connect(GTK_OBJECT (window),
                       "delete_event",
               GTK_SIGNAL_FUNC(close_application),
                       NULL);
   gtk_container_set_border_width( GTK_CONTAINER
 (window), 10 );
   gtk_widget_show( window );
 
 
   /**
    * Create curve
    */
   curve = gtk_curve_new ();
   gtk_container_add (GTK_CONTAINER (window), curve);
   gtk_widget_show (curve);
 
 
   //init points 
   max = 127 + (count % 2)*128;
 
   //Vector
   for (i = 0; i < max; ++i)
     vec[i] = (127 / sqrt (max)) * sqrt (i);
 
   gtk_curve_set_range (GTK_CURVE (curve),0, max, 0,
 max);
 
   gtk_curve_set_vector (GTK_CURVE (curve),max, vec);
 
 //  GTK_CURVE
 (curve)-curve_type=GTK_CURVE_TYPE_SPLINE;
 
 // 
 GTK_CURVE(curve)-curve_type=GTK_CURVE_TYPE_LINEAR;
 
  

//gtk_curve_set_curve_type(GTK_CURVE(curve),GTK_CURVE_TYPE_FREE);
 
 //  gtk_curve_set_curve_type (GTK_CURVE (curve),
 GTK_CURVE_TYPE_LINEAR);
 
   /**
    * Show window
    */
 
   if (!GTK_WIDGET_VISIBLE (window))
     gtk_widget_show (window);
   else if (count % 4 == 3)
     {
       gtk_widget_destroy (window);
       window = NULL;
     }
 
   ++count;  
 
 
   gtk_main();
   return 0;
 
 }//main
 
 
 for compile:
 gcc -Wall -g curve.c -o curve `gtk-config --cflags` \
       `gtk-config --libs`
 
 execution: ./curve
 
 Al to try to change the type to lineal leaves this
 error. As it can do?? Many
   Thanks al that can help me
 
 GLib-ERROR **: could not allocate -20 bytes
 aborting...
 Abort (core dumped)
 
 Carlos Llano

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