Fixed boolean expression that breaks the CMS toolbar on non-CMS pages with static placeholders.

The boolean expression changed in this commit was breaking the CMS toolbar for me on non-CMS Page that happened to have a static placeholder, after attempting to login as the superuser using the CMS toolbar.

AttributeError at /en/shop/products/
'NoneType' object has no attribute 'publisher_public_id'
Request Method:	GET
Request URL:	http://localhost:8000/en/shop/products/
Django Version:	1.6.2
Exception Type:	AttributeError
Exception Value:	
'NoneType' object has no attribute 'publisher_public_id'
Exception Location:	/Users/eric/.virtualenvs/site-awesim/lib/python2.7/site-packages/cms/cms_toolbar.py in post_template_populate, line 197
Python Executable:	/Users/eric/.virtualenvs/site-awesim/bin/python
Python Version:	2.7.6
Python Path:	
['/Users/eric/Nimbis/site-awesim',
 '/Users/eric/.virtualenvs/site-awesim/lib/python27.zip',
 '/Users/eric/.virtualenvs/site-awesim/lib/python2.7',
 '/Users/eric/.virtualenvs/site-awesim/lib/python2.7/plat-darwin',
 '/Users/eric/.virtualenvs/site-awesim/lib/python2.7/plat-mac',
 '/Users/eric/.virtualenvs/site-awesim/lib/python2.7/plat-mac/lib-scriptpackages',
 '/Users/eric/.virtualenvs/site-awesim/lib/python2.7/lib-tk',
 '/Users/eric/.virtualenvs/site-awesim/lib/python2.7/lib-old',
 '/Users/eric/.virtualenvs/site-awesim/lib/python2.7/lib-dynload',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
 '/Users/eric/.virtualenvs/site-awesim/lib/python2.7/site-packages']
Server time:	Wed, 12 Mar 2014 12:15:35 -0400