auth/factotum: fix password prompt hang with secstore

R=rsc
http://codereview.appspot.com/6906057
diff --git a/src/cmd/auth/factotum/main.c b/src/cmd/auth/factotum/main.c
index 2cf3966..1f603ac 100644
--- a/src/cmd/auth/factotum/main.c
+++ b/src/cmd/auth/factotum/main.c
@@ -70,8 +70,6 @@
 	if(argc != 0)
 		usage();
 
-	rfork(RFNOTEG);
-
 	if(trysecstore && havesecstore()){
 		while(secstorefetch() < 0){
 			rerrstr(err, sizeof err);
@@ -81,7 +79,9 @@
 			fprint(2, "Enter an empty password to quit.\n");
 		}
 	}
-	
+
+	rfork(RFNOTEG);
+
 	fsinit0();
 	threadpostmountsrv(&fs, service, mtpt, MBEFORE);
 	threadexits(nil);