Fixes #11 -- correctly scope hook!

Author: alex

src/ld_preload.rs

@@ -59,7 +59,7 @@ macro_rules! hook {
     };
 
     (unsafe fn $real_fn:ident ( $($v:ident : $t:ty),* ) => $hook_fn:ident $body:block) => {
-        hook! { unsafe fn $real_fn ( $($v : $t),* ) -> () => $hook_fn $body }
+        $crate::hook! { unsafe fn $real_fn ( $($v : $t),* ) -> () => $hook_fn $body }
     };
 }