Added missing call to glibgtop_init() / glibtop_close()

* df.c: (main):
	* pprint.c: (main):
	* procargs.c: (main): Added missing call to glibgtop_init() / glibtop_close()

examples/pprint.c

@@ -240,5 +240,7 @@ int main()
 
   pprint_get_uptime();
 
+  glibtop_close();
+
   return 0;
 }