Correcting mistake in license header from bug 456214, comment only change

toolkit/themes/pinstripe/global/viewbuttons.css

@@ -11,7 +11,7 @@
  * for the specific language governing rights and limitations under the
  * License.
  *
- * The Original Code is the nsSessionStore component.
+ * The Original Code is mozilla.org code.
  *
  * The Initial Developer of the Original Code is
  * Markus Stange <mstange@themasta.com>