Makes the locale test not always pass, be verbose when it is skipped.

lib/Cake/Test/Case/Model/Datasource/Database/MysqlTest.php

@@ -152,7 +152,8 @@ class MysqlTest extends CakeTestCase {
 		$this->skipIf(DS === '\\', 'The locale is not supported in Windows and affect the others tests.');
 
 		$restore = setlocale(LC_NUMERIC, 0);
-		setlocale(LC_NUMERIC, 'de_DE');
+
+		$this->skipIf(setlocale(LC_NUMERIC, 'de_DE') === false, "The German locale isn't available.");
 
 		$result = $this->Dbo->value(3.141593);
 		$this->assertEquals('3.141593', $result);

lib/Cake/Test/Case/Model/Datasource/Database/PostgresTest.php

@@ -340,7 +340,8 @@ class PostgresTest extends CakeTestCase {
  */
 	public function testLocalizedFloats() {
 		$restore = setlocale(LC_NUMERIC, 0);
-		setlocale(LC_NUMERIC, 'de_DE');
+
+		$this->skipIf(setlocale(LC_NUMERIC, 'de_DE') === false, "The German locale isn't available.");
 
 		$result = $this->db->value(3.141593, 'float');
 		$this->assertEquals("3.141593", $result);

lib/Cake/Test/Case/Model/ModelWriteTest.php

@@ -6472,7 +6472,8 @@ class ModelWriteTest extends BaseModelTest {
  */
 	public function testWriteFloatAsGerman() {
 		$restore = setlocale(LC_NUMERIC, 0);
-		setlocale(LC_NUMERIC, 'de_DE');
+
+		$this->skipIf(setlocale(LC_NUMERIC, 'de_DE') === false, "The German locale isn't available.");
 
 		$model = new DataTest();
 		$result = $model->save(array(