[ticket/14972] replace all occurrences of sizeof() with the count()

PHPBB3-14972

tests/functions/get_remote_file_test.php

@@ -58,7 +58,7 @@ class phpbb_functions_get_remote_file extends phpbb_test_case
 
 		$this->assertGreaterThanOrEqual(
 			2,
-			sizeof($lines),
+			count($lines),
 			'Failed asserting that the version file has at least two lines.'
 		);