Fix potential segmentation fault on iOS.

[meshlink] / src / utcp

diff --git a/src/utcp b/src/utcp
index 19f3f4462c52eaa766ab76ce671921f0e4dc4ebd..eb85ec4ae5f32102430e0622e3855aaba110c032 160000 (submodule)
--- a/src/utcp
+++ b/src/utcp
@@ -1 +1 @@
-Subproject commit 19f3f4462c52eaa766ab76ce671921f0e4dc4ebd
+Subproject commit eb85ec4ae5f32102430e0622e3855aaba110c032