alien.debugger: fix USING: form

basis/alien/debugger/debugger.factor

@@ -1,6 +1,7 @@
 ! Copyright (C) 2010 Joe Groff.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: ;
+USING: alien.c-types alien.parser summary sequences accessors
+prettyprint ;
 IN: alien.debugger
 
 M: no-c-type summary name>> unparse "“" "” is not a C type" surround ;