E_STRICT errors in style.php when recompiling style components

How to reproduce:
[list: 12dlvq4f]* In your php.ini, set error_reporting to E_ALL | E_STRICT

• Install clean phpBB 3.0.0
• Enable "recompile stale style components" in the acp
• save or touch any of the .css files in styles/prosilver/theme
• open your forum in the browser -> you get a page without css
• If you directly open style.php?sid=xxxx&id=1&lang=en in your browser, you see the reason:

  Strict Standards: Non-static method acp_styles::db_theme_data() should not be called statically in path\to\phpBB3\style.php on line 181
  Strict Standards: Non-static method acp_styles::load_css_file() should not be called statically in path\to\phpBB3\includes\acp\acp_styles.php on line 2397
  Strict Standards: Non-static method acp_styles::load_css_file() should not be called statically in path\to\phpBB3\includes\acp\acp_styles.php on line 2397
  Strict Standards: Non-static method acp_styles::load_css_file() should not be called statically in path\to\phpBB3\includes\acp\acp_styles.php on line 2397
  Strict Standards: Non-static method acp_styles::load_css_file() should not be called statically in path\to\phpBB3\includes\acp\acp_styles.php on line 2397
  Strict Standards: Non-static method acp_styles::load_css_file() should not be called statically in path\to\phpBB3\includes\acp\acp_styles.php on line 2397
  Strict Standards: Non-static method acp_styles::load_css_file() should not be called statically in path\to\phpBB3\includes\acp\acp_styles.php on line 2397
  Strict Standards: Non-static method acp_styles::load_css_file() should not be called statically in path\to\phpBB3\includes\acp\acp_styles.php on line 2397
  Strict Standards: Non-static method acp_styles::load_css_file() should not be called statically in path\to\phpBB3\includes\acp\acp_styles.php on line 2397
  Warning: Cannot modify header information - headers already sent by (output started at path\to\phpBB3\style.php:181) in path\to\phpBB3\style.php on line 200
  Warning: Cannot modify header information - headers already sent by (output started at path\to\phpBB3\style.php:181) in path\to\phpBB3\style.php on line 207

In common.php there is a call to error_reporting() that is supposed to suppress E_STRICT errors but since style.php does not include common.php, the value from php.ini is used instead