oups, la valeur par defaut etait fausse

Common/DefaultOptions.h

@@ -505,7 +505,7 @@ StringXNumber PrintOptions_Number[] = {
     "Output transparent GIF image" },
   { F|O, "FontSize" , opt_print_font_size , 12. ,
     "Font size used for postscript printing" },
-  { F|O, "GeometryLineWidth" , opt_print_geom_line_width , 4. ,
+  { F|O, "GeometryLineWidth" , opt_print_geom_line_width , 1. ,
     "Width factor for geometry lines in postscript output" },
   { 0, NULL , NULL , 0. }
 } ;