fix load error

basis/structs/structs.factor

@@ -1,4 +1,4 @@
-USING: alien.c-types alien.syntax kernel math ;
+USING: alien.c-types alien.syntax kernel math unix.types ;
 IN: structs
 
 C-STRUCT: timeval

basis/unix/time/time.factor

@@ -1,8 +1,8 @@
-USING: kernel alien.syntax alien.c-types math ;
+! Copyright (C) 2008 Doug Coleman.
+! See http://factorcode.org/license.txt for BSD license.
+USING: kernel alien.syntax alien.c-types math unix.types ;
 IN: unix.time
 
-TYPEDEF: uint time_t
-
 C-STRUCT: tm
     { "int" "sec" }    ! Seconds: 0-59 (K&R says 0-61?)
     { "int" "min" }    ! Minutes: 0-59