js/slMapClickHandler: Fix wrong trigger() return type annotation
js/slMapClickHandler: Fix wrong trigger() return type annotation

Turbo87/skylines,skylines-project/skylines,Harry-R/skylines,snip/skylines,shadowoneau/skylines,TobiasLohner/SkyLines,snip/skylines,shadowoneau/skylines,TobiasLohner/SkyLines,RBE-Avionik/skylines,kerel-fs/skylines,Turbo87/skylines,shadowoneau/skylines,Turbo87/skylines,skylines-project/skylines,Harry-R/skylines,skylines-project/skylines,kerel-fs/skylines,Turbo87/skylines,RBE-Avionik/skylines,snip/skylines,TobiasLohner/SkyLines,RBE-Avionik/skylines,kerel-fs/skylines,Harry-R/skylines,RBE-Avionik/skylines,Harry-R/skylines,shadowoneau/skylines,skylines-project/skylines