linebuf: avoid %d/%u sign confusion

diff --git a/src/libmowgli/linebuf/linebuf.c b/src/libmowgli/linebuf/linebuf.c
index 039568013c6f98a3a48d9884a8d270df27740e17..80c4002bcbc0f44aae148a383cd00ba06cf7e929 100644 (file)
--- a/src/libmowgli/linebuf/linebuf.c
+++ b/src/libmowgli/linebuf/linebuf.c
@@ -213,7 +213,7 @@ mowgli_linebuf_write_data(mowgli_eventloop_t *eventloop, mowgli_eventloop_io_t *
                        if (ret != 0)
                        {
                                mowgli_pollable_setselect(eventloop, io, MOWGLI_EVENTLOOP_IO_WRITE, NULL);
-                               mowgli_log("mowgli_vio_write returned error [%ld]: %s", linebuf->vio->error.code, linebuf->vio->error.string);
+                               mowgli_log("mowgli_vio_write returned error [%lu]: %s", linebuf->vio->error.code, linebuf->vio->error.string);
                                return;
                        }