bindfs.c: Address warning -Wsign-compare

Symptom with Apple GCC:
> bindfs.c:1677:26: error: comparison of integers of different signs: 'size_t' (aka 'unsigned long') and 'ssize_t' (aka 'long') [-Werror,-Wsign-compare]
>             } while (len < res);
>                      ~~~ ^ ~~~

1 files changed, 1 insertions, 1 deletions

diff --git a/src/bindfs.c b/src/bindfs.c
index 5f52395..033e3a4 100644
--- a/src/bindfs.c
+++ b/src/bindfs.c
@@ -1674,7 +1674,7 @@ static int bindfs_listxattr(const char *path, char* list, size_t size)
                 }
                 curr += thislen;
                 len += thislen;
-            } while (len < res);
+            } while (len < (size_t)res);
         } else {
             // TODO: https://github.com/osxfuse/fuse/blob/master/example/fusexmp_fh.c
             // had this commented out bit here o_O