From 3bc7123592b31535567ed1e643d2e6a73d696452 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Tue, 17 Jan 2012 16:26:59 +0000
Subject: Fix crashes when loading presets with no UI present (fix #808).

git-svn-id: http://svn.drobilla.net/lad/trunk/jalv@3956 a436a847-0d15-0410-975c-d299462d15a1
---
 src/jalv.c  |  4 ++++
 src/state.c | 16 +++++++++-------
 2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/src/jalv.c b/src/jalv.c
index b4bd530..c719ead 100644
--- a/src/jalv.c
+++ b/src/jalv.c
@@ -486,6 +486,10 @@ jalv_ui_write(SuilController controller,
 {
 	Jalv* host = (Jalv*)controller;
 
+	if (!host->ui) {
+		return;
+	}
+
 	if (protocol != 0 && protocol != host->atom_prot_id) {
 		fprintf(stderr, "UI write with unsupported protocol %d (%s)\n",
 		        protocol, symap_unmap(host->symap, protocol));
diff --git a/src/state.c b/src/state.c
index 03362fb..3ef4d3d 100644
--- a/src/state.c
+++ b/src/state.c
@@ -140,13 +140,15 @@ set_port_value(const char*     port_symbol,
 	jalv_ui_write(jalv, port->index, sizeof(fvalue), 0, &fvalue);
 
 	// Update UI
-	char buf[sizeof(ControlChange) + sizeof(fvalue)];
-	ControlChange* ev = (ControlChange*)buf;
-	ev->index    = port->index;
-	ev->protocol = 0;
-	ev->size     = sizeof(fvalue);
-	*(float*)ev->body = fvalue;
-	jack_ringbuffer_write(jalv->plugin_events, buf, sizeof(buf));
+	if (jalv->ui) {
+		char buf[sizeof(ControlChange) + sizeof(fvalue)];
+		ControlChange* ev = (ControlChange*)buf;
+		ev->index    = port->index;
+		ev->protocol = 0;
+		ev->size     = sizeof(fvalue);
+		*(float*)ev->body = fvalue;
+		jack_ringbuffer_write(jalv->plugin_events, buf, sizeof(buf));
+	}
 }
 
 void
-- 
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