From dc53f3d1329ddbbf777a9ba573797dc270fecc75 Mon Sep 17 00:00:00 2001
From: William Woodall <wjwwood@gmail.com>
Date: Fri, 13 Jan 2012 15:39:17 -0600
Subject: [PATCH] Fixing a warning.

---
 src/impl/unix.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/impl/unix.cc b/src/impl/unix.cc
index f583eb4..77ca79c 100644
--- a/src/impl/unix.cc
+++ b/src/impl/unix.cc
@@ -226,7 +226,7 @@ Serial::SerialImpl::read (size_t size) {
   fd_set readfds;
   memset(buf, 0, (size + 1) * sizeof(*buf));
   ssize_t bytes_read = 0;
-  while (bytes_read < size) {
+  while (bytes_read < (ssize_t)size) {
     if (timeout_ != -1) {
       FD_ZERO(&readfds);
       FD_SET(fd_, &readfds);