[BUGFIX] Correct value for jQuery.noConflict = 0

When page.javascriptLibs.jQuery.noConflict was set to 0,
the page renderer API got "FALSE" for the parameter
"$namespace", but it expects a string or a constant.

Change-Id: Ib053d12371bace2b7b081b09f99f31a504879b08
Resolves: #38750
Relates: #38737
Reviewed-on: http://review.typo3.org/12706
Reviewed-by: Wouter Wolters
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel