Suspend su with the signal which stopped the child

* src/su.c: Suspend su with the signal which stopped the child
	instead of always SIGSTOP.

ChangeLog

@@ -1,3 +1,8 @@
+2013-08-21  Nicolas François  <nicolas.francois@centraliens.net>
+
+	* src/su.c: Suspend su with the signal which stopped the child
+	instead of always SIGSTOP.
+
 2013-08-20  Nicolas François  <nicolas.francois@centraliens.net>
 
 	* src/su.c: call handle_session() before changing the UID so that

src/su.c

@@ -477,7 +477,7 @@ static void handle_session (const struct passwd *pw)
 			           && (0 != WIFSTOPPED (status))) {
 				/* The child (shell) was suspended.
 				 * Suspend su. */
-				kill (getpid (), SIGSTOP);
+				kill (getpid (), WSTOPSIG (status));
 				/* wake child when resumed */
 				kill (pid, SIGCONT);
 				stop = false;