fetch_file_contents: fix shim when invoked with 1 argument only

include/functions.php

@@ -343,7 +343,7 @@
 		global $fetch_last_content_type;
 		global $fetch_curl_used;
 
-		if (!is_array($options) && func_num_args() > 1) {
+		if (!is_array($options)) {
 
 			// falling back on compatibility shim
 			$options = array(