[BUGFIX] Fix regression in RenderingContext::__construct w/o View

This patch fixes a regression after https://review.typo3.org/#/c/50590/
which unfortunately caused some custom implementations
(e.g. static info tables extension) to fail with a PHP fatal error.

Change-Id: I61f7327208e20a973471fbfed02fe83c00d3995c
Resolves: #78746
Releases: master
Reviewed-on: https://review.typo3.org/50708


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Riccardo De Contardi <erredeco@gmail.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>