[GTK] Typo in  webkit_security_manager_register_uri_scheme_as_empty_document documentation
https://bugs.webkit.org/show_bug.cgi?id=136852

Patch by Tomas Popela <tpopela@redhat.com> on 2014-09-16
Reviewed by Carlos Garcia Campos.

* UIProcess/API/gtk/WebKitSecurityManager.cpp:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@173658 268f45cc-cd09-0410-ab3c-d52691b4dbfc