Big PAM cleanup

Added header for arc4random to mktemp.c

Fixed return type of arc4random
diff --git a/mktemp.c b/mktemp.c
index 919c531..69dc4dc 100644
--- a/mktemp.c
+++ b/mktemp.c
@@ -47,6 +47,8 @@
 #include <ctype.h>
 #include <unistd.h>
 
+#include "helper.h"
+
 static int _gettemp __P((char *, int *, int, int));
 
 int