fix incorrect FSF address

plugins/hextray/sdAlerts.h

@@ -13,7 +13,7 @@
  * 
  * You should have received a copy of the GNU General Public License
  * along with X-Tray; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
 #ifndef _H_SDALERTS_H
@@ -23,4 +23,4 @@ void				sdSystemAlert	(HINSTANCE, UINT, char *, char *, UINT);
 LRESULT CALLBACK	sdAlertProc		(HWND, UINT, WPARAM, LPARAM);
 int					sdAlertNum		();
 void				sdCloseAlerts	();
-#endif
+#endif