fixes failing test case ValidationTest::testDecimalLocaleSet() on OS X

thousand separator isn't set in de_DE but in da_DK

Author: Schlaefer

lib/Cake/Test/Case/Utility/ValidationTest.php

@@ -1662,7 +1662,7 @@ public function testDecimalCustomRegex() {
 	public function testDecimalLocaleSet() {
 		$this->skipIf(DS === '\\', 'The locale is not supported in Windows and affects other tests.');
 		$restore = setlocale(LC_NUMERIC, 0);
-		$this->skipIf(setlocale(LC_NUMERIC, 'de_DE') === false, "The German locale isn't available.");
+		$this->skipIf(setlocale(LC_NUMERIC, 'da_DK') === false, "The Danish locale isn't available.");
 
 		$this->assertTrue(Validation::decimal(1.54), '1.54 should be considered a valid float');
 		$this->assertTrue(Validation::decimal('1.54'), '"1.54" should be considered a valid float');