Container fixup.

captcha.php

@@ -30,5 +30,4 @@ header("Pragma: no-cache");
 header("Accept-Ranges: bytes");
 header("Content-type: image/png");
 ImageTtfText($img, $ttfsize, $angle, $t_x, $t_y, $color, $ttf, $captchaText);
-ImagePNG($img);
-ImageDestroy($img);
+ImagePNG($img);