From 88cd13b11532af393e48fdc0393acb5a268f6179 Mon Sep 17 00:00:00 2001
From: Brendan McDonnell <bmcdonnell@ionxlive.com>
Date: Mon, 5 Feb 2018 15:01:46 -0500
Subject: [PATCH] cast to resolve signed/unsigned comparison compiler warning
 in FATFileSystem::dir_seek()

---
 features/filesystem/fat/FATFileSystem.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/features/filesystem/fat/FATFileSystem.cpp b/features/filesystem/fat/FATFileSystem.cpp
index 69fbc29c7d..ece5be1432 100644
--- a/features/filesystem/fat/FATFileSystem.cpp
+++ b/features/filesystem/fat/FATFileSystem.cpp
@@ -712,13 +712,14 @@ ssize_t FATFileSystem::dir_read(fs_dir_t dir, struct dirent *ent)
 void FATFileSystem::dir_seek(fs_dir_t dir, off_t offset)
 {
     FATFS_DIR *dh = static_cast<FATFS_DIR*>(dir);
+    off_t dptr = static_cast<off_t>(dh->dptr);
 
     lock();
 
-    if (offset < dh->dptr) {
+    if (offset < dptr) {
         f_rewinddir(dh);
     }
-    while (dh->dptr < offset) {
+    while (dptr < offset) {
         FILINFO finfo;
         FRESULT res;