initscripts: Fix reading PIDs

An incorrect variable has been used.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

src/initscripts/system/functions

@@ -522,11 +522,11 @@ loadproc()
 		(
 			${cmd[@]} &>/dev/null
 		) &
-		pid="$!"
+		pid="$$"
 		evaluate_retval
 	else
 		${cmd[@]}
-		pid="$!"
+		pid="$$"
 		evaluate_retval # This is "Probably" not LSB compliant, but required to be compatible with older bootscripts
 	fi