Fix test failure

src/sys/socket/mod.rs

@@ -849,13 +849,13 @@ pub fn sendmmsg<'a, I, C>(fd: RawFd, data: impl std::iter::IntoIterator<Item=&'a
 
     let mut initialized_data = unsafe { mem::transmute::<_, Vec<libc::mmsghdr>>(output) };
 
-    let ret = unsafe { libc::sendmmsg(fd, initialized_data.as_mut_ptr(), initialized_data.len() as u32, flags.bits() as _) };
+    let ret = unsafe { libc::sendmmsg(fd, initialized_data.as_mut_ptr(), initialized_data.len() as _, flags.bits() as _) };
 
     let sent_messages = Errno::result(ret)? as usize;
     let mut sent_bytes = Vec::with_capacity(sent_messages);
     unsafe { sent_bytes.set_len(sent_messages) };
 
-    for i in 0..sent_messages {
+    for i in 0..sent_messages
         sent_bytes[i] = initialized_data[i].msg_len as usize;
     }
 
@@ -940,7 +940,7 @@ pub fn recvmmsg<'a, I>(
         ptr::null_mut()
     };
 
-    let ret = unsafe { libc::recvmmsg(fd, initialized_data.as_mut_ptr(), initialized_data.len() as u32, flags.bits() as _, timeout) };
+    let ret = unsafe { libc::recvmmsg(fd, initialized_data.as_mut_ptr(), initialized_data.len() as _, flags.bits() as _, timeout) };
 
     let r = Errno::result(ret)?;