Make Sure PDO::FETCH_DEFAULT is Defined

PDO::FETCH_DEFAULT arrived as of PHP v8.0.7.  For those still on 7.4
referring to it directly in the code causes it to break with an
undefined constant.

This checks to make sure the constant exists before comparing against
it.

src/FakePdoStatementTrait.php

@@ -339,7 +339,7 @@ public function fetch(
         $cursor_orientation = \PDO::FETCH_ORI_NEXT,
         $cursor_offset = 0
     ) {
-        if ($fetch_style === -123 || $fetch_style === \PDO::FETCH_DEFAULT) {
+        if ($fetch_style === -123 || (defined('PDO::FETCH_DEFAULT') && $fetch_style === \PDO::FETCH_DEFAULT)) {
             $fetch_style = $this->fetchMode;
         }
 
@@ -415,7 +415,7 @@ public function fetchColumn($column = 0)
      */
     public function universalFetchAll(int $fetch_style = -123, ...$args) : array
     {
-        if ($fetch_style === -123 || $fetch_style === \PDO::FETCH_DEFAULT) {
+        if ($fetch_style === -123 || (defined('PDO::FETCH_DEFAULT') && $fetch_style === \PDO::FETCH_DEFAULT)) {
             $fetch_style = $this->fetchMode;
             $fetch_argument = $this->fetchArgument;
             $ctor_args = $this->fetchConstructorArgs;

tests/EndToEndTest.php

@@ -54,6 +54,10 @@ public function testSelectWithDefaultFetchAssoc()
 
     public function testSelectFetchDefault()
     {
+        if (!defined('PDO::FETCH_DEFAULT')) {
+            $this->markTestSkipped('PHP version does not support PDO::FETCH_DEFAULT');
+        }
+
         $pdo = self::getConnectionToFullDB();
 
         $query = $pdo->prepare("SELECT id FROM `video_game_characters` WHERE `id` > :id ORDER BY `id` ASC");