Correct the behaviour of casting spl files to strings

Author: duncan3dc

ext/spl/spl_directory.c

@@ -3112,7 +3112,7 @@ static const zend_function_entry spl_SplFileObject_functions[] = {
 	SPL_ME(SplFileObject, seek,           arginfo_file_object_seek,          ZEND_ACC_PUBLIC)
 	/* mappings */
 	SPL_MA(SplFileObject, getCurrentLine, SplFileObject, fgets,      arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
-	SPL_MA(SplFileObject, __toString,     SplFileObject, current,    arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
+	SPL_MA(SplFileObject, __toString,     SplFileObject, fgets,      arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
 	PHP_FE_END
 };