Don't pass parameters when souring scripts

Passing additional parameters when sourcing scripts is not specified in
POSIX [1]. For example dash simply ignores it and proposes to use set
instead [2]. This is needed to use sxmo on top of Debian.

[1] https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#dot
[2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=713805#10

Signed-off-by: Anjandev Momi <anjan@momi.ca>

scripts/core/sxmo_xinit.sh

@@ -113,7 +113,8 @@ startdwm() {
 
 	exec dbus-run-session sh -c "
 		$0 daemonsneedingdbus;
-		. $0 customxinit;
+		set -- customxinit
+		. $0
 		dwm 2> "$XDG_CACHE_HOME/sxmo/dwm.log"
 	"
 }