Update libpyva reference

diff --git a/pyva/pyva-native b/pyva/pyva-native
index da5f3486817468ddea63a4e96b47e12d068d8514..fc8f03599b2609e239c7571b366968824676a0ba 160000 (submodule)
--- a/pyva/pyva-native
+++ b/pyva/pyva-native
@@ -1 +1 @@
-Subproject commit da5f3486817468ddea63a4e96b47e12d068d8514
+Subproject commit fc8f03599b2609e239c7571b366968824676a0ba