Add missing variables declaration.

tests/arab_to_roman.aer

@@ -8,6 +8,8 @@ class Program {
 			'X' => 10, 'IX' => 9, 'V' => 5, 'IV' => 4, 'I' => 1};
 
 		int $matches;
+		string $roman;
+		int $value;
 		foreach($lookup as $roman => $value) {
 			$matches = (int) ($n / $value);
 			$result += str_repeat($roman, $matches);