Always update g:tpipeline_statusline for lualine

Otherwise we sometimes might use the wrong statusline with lualine.

Author: vimpostor

autoload/tpipeline.vim

@@ -33,6 +33,9 @@ func tpipeline#build_hooks()
 		endif
 
 		if empty(g:tpipeline_statusline) && !g:tpipeline_tabline
+			if tpipeline#util#is_lualine()
+				au OptionSet statusline let g:tpipeline_statusline = &stl
+			endif
 			if g:tpipeline_clearstl
 				if tpipeline#util#is_lualine()
 					au OptionSet statusline if v:option_type == 'local' | call tpipeline#util#clear_all_stl() | endif