Switch the SSfxViewShell param for the SfxPrinterController from pointer to reference to make clear it's always non-null. This allows to drop now superfluous null-checks. Change-Id: I49862b6eeffbf7db388520e801a50557205631a9 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/211074 Reviewed-by: Michael Weghorn <m.weghorn@posteo.de> Tested-by: Jenkins