ipa: use default write callback in ipa_client_conn_create if not specified
If no write callback is specified, use the default write callback.
Thus, we don't need to export ipa_client_write_default_cb.
No clients of this function outside libosmo-abis, so no breakages should
be expected.
diff --git a/src/ipa_proxy.c b/src/ipa_proxy.c
index 6f2525a..f4e1df8 100644
--- a/src/ipa_proxy.c
+++ b/src/ipa_proxy.c
@@ -190,7 +190,7 @@
route->shared->dst.inst->net.port,
NULL,
ipa_sock_dst_cb,
- ipa_client_write_default_cb,
+ NULL,
conn);
if (conn->dst == NULL) {
LOGP(DLINP, LOGL_ERROR, "could not create client: %s\n",