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/procargs.c

@@ -40,6 +40,8 @@ int main(int argc, char **argv)
       show_args(pid, 15);
     }
 
+  glibtop_close();
+
   return 0;
 }