title: Right align in spin button (gtk/C)
body: <p>I am writing GIMP plugin in C and need to right align a number inside a GTK+ spin button.</p>
  
  <p>I found out about <code>gtk_button_set_alignment()</code> but nothing like <code>gtk_spin_button_set_alignment()</code> seems to exist.</p>
  
  <p>How can be this done?</p>