PHP STRICT Warning "Only variables should be passed by reference"

Hi,

Noticed the following warning / error in my logs:

URL: http://example.com/wp-admin/network/settings.php
Referrer: http://example.com/wp-admin/network/plugins.php
Error(E_STRICT): Only variables should be passed by reference
Source: /var/sites/g/example.com/public_html/wp-content/plugins/p3-profiler/p3-profiler.php [56]

Trace:
#1 /var/sites/g/example.com/public_html/wp-admin/network/settings.php:11 - require_once('/var/si...')
#2 /var/sites/g/example.com/public_html/wp-admin/network/admin.php:13 - require_once('/var/si...')
#3 /var/sites/g/example.com/public_html/wp-admin/admin.php:30 - require_once('/var/si...')
#4 /var/sites/g/example.com/public_html/wp-load.php:29 - require_once('/var/si...')
#5 /var/sites/g/example.com/public_html/wp-config.php:163 - require_once('/var/si...')
#6 /var/sites/g/example.com/public_html/wp-settings.php:195 - include_once('/var/si...')

POST:
array (
)

GET:
array (
)

This is probably an easy fix, it seems the use of the end function isn’t quite correct according to the docs for the single parameter passed in:

This array is passed by reference because it is modified by
the function. This means you must pass it a real variable and not
a function returning an array because only actual variables may be
passed by reference.

Cheers,
Dean.

http://ww.wp.xz.cn/extend/plugins/p3-profiler/ version 1.4.1