[BUGFIX] Replace MCONF['name'] in PageLayoutController

$MCONF['name'] is not defined in the "Page" module, replace
it $this->moduleName, being "web_layout".

Resolves: #70065
Releases: master
Change-Id: Iee3e69fbdbc434f9a7971b52089ffd694ab2e402
Reviewed-on: http://review.typo3.org/43518


Reviewed-by: Helmut Hummel <helmut.hummel@typo3.org>
Tested-by: Helmut Hummel <helmut.hummel@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>