Add test

Author: VincentLanglet

tests/PHPStan/Rules/Comparison/data/bug-14534.php

@@ -10,3 +10,12 @@ function test(\SplFileObject $spl): bool
 
 	return false;
 }
+
+function test2(\SplTempFileObject $spl): bool
+{
+	if ($spl->key() === 1) {
+		return $spl->key() === 1;
+	}
+
+	return false;
+}