Fix failing tests.

Two buffers are needed now that handleFatalError() is blowing one up.
Related to pull request #1158

lib/Cake/Test/Case/Error/ErrorHandlerTest.php

@@ -252,14 +252,16 @@ public function testLoadPluginHandler() {
/**
 * test handleFatalError generating a page.
 *
 * These tests start two buffers as handleFatalError blows the outer one up.
 *
 * @return void
 */
	public function testHandleFatalErrorPage() {
		$this->skipIf(file_exists(APP . 'app_error.php'), 'App error exists cannot run.');

		$originalDebugLevel = Configure::read('debug');
		$line = __LINE__;

		ob_start();
		ob_start();
		Configure::write('debug', 1);
		ErrorHandler::handleFatalError(E_ERROR, 'Something wrong', __FILE__, $line);
@@ -268,15 +270,14 @@ public function testHandleFatalErrorPage() {
		$this->assertContains(__FILE__, $result, 'filename missing.');
		$this->assertContains((string)$line, $result, 'line missing.');

		ob_start();
		ob_start();
		Configure::write('debug', 0);
		ErrorHandler::handleFatalError(E_ERROR, 'Something wrong', __FILE__, $line);
		$result = ob_get_clean();
		$this->assertNotContains('Something wrong', $result, 'message must not appear.');
		$this->assertNotContains(__FILE__, $result, 'filename must not appear.');
		$this->assertContains('An Internal Error Has Occurred', $result);

		Configure::write('debug', $originalDebugLevel);
	}

/**