free lv2 ports slice

src/image.zig

@@ -307,6 +307,7 @@ pub const Image = struct {
         defer ctx.deinit();
 
         var ports = try lv2.setupPorts(&ctx);
+        defer ctx.allocator.free(ports);
 
         if (ctx.n_audio_in > 2) {
             std.debug.warn("plugin <{}> has more than two inputs.\n", .{plugin_uri});

src/lv2_helpers.zig

@@ -59,6 +59,8 @@ pub const Port = struct {
 /// Setup ports for a given plugin. Gives an array to pointers of Port structs.
 /// This setup is required so we link the plugin to the ports later on, and
 /// also link our buffers, and control values.
+///
+/// Caller owns returned memory.
 pub fn setupPorts(ctx: *plugin.Context) ![]Port {
     var world = ctx.world;
     const n_ports: u32 = c.lilv_plugin_get_num_ports(ctx.plugin);