From 8209b4b9487ac40bbd3a82695d83c2561d1f3a6c Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Wed, 30 Sep 2020 04:41:59 +0200
Subject: [PATCH] VST3: handle zero length plugin state

---
 libs/ardour/vst3_host.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libs/ardour/vst3_host.cc b/libs/ardour/vst3_host.cc
index cd9c085cda..8b1c807269 100644
--- a/libs/ardour/vst3_host.cc
+++ b/libs/ardour/vst3_host.cc
@@ -474,7 +474,7 @@ RAMStream::RAMStream (uint8_t* data, size_t size)
 	, _pos (0)
 	, _readonly (true)
 {
-	if (reallocate_buffer (_size, true)) {
+	if (size > 0 && reallocate_buffer (_size, true)) {
 		memcpy (_data, data, _size);
 	} else {
 		_size = 0;
@@ -494,7 +494,7 @@ RAMStream::RAMStream (std::string const& fn)
 	if (!g_file_get_contents (fn.c_str (), &buf, &length, NULL)) {
 		return;
 	}
-	if (reallocate_buffer (length, true)) {
+	if (length > 0 && reallocate_buffer (length, true)) {
 		_size = length;
 		memcpy (_data, buf, _size);
 	}