progs/demos: fix glut initialization calls

Remove glutInitWindowPosition() calls to play nicer with window managers.

Move glutInitWindowSize() calls before glutInit() so the the default window
size can be overridden by the -geometry cmd line option.

progs/demos/pointblast.c

@@ -427,10 +427,10 @@ int
 main(int argc, char **argv)
 {
   int i;
+
+  glutInitWindowSize(300, 300);
   glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
-  glutInitWindowPosition(0, 0);
-  glutInitWindowSize(300, 300);
 
   for (i=1; i<argc; i++) {
     if(!strcmp("-noms", argv[i])) {