Suppress improper_ctypes warnings from zero sized pointer targets

core-foundation-sys/src/lib.rs

@@ -6,8 +6,7 @@
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
-
-#![allow(non_snake_case, non_camel_case_types, non_upper_case_globals)]
+#![allow(non_snake_case, non_camel_case_types, non_upper_case_globals, improper_ctypes)]
 
 extern crate libc;