protocol: Fix missing textures on worker nodes

The network protocol hasn't seen much attention for a long time, so
state sync bugs have appeared.
It's not really sustainable to have to maintain protocol.c every time a
node is added or the internal structs change. I need a nice minimal
library that can generate serialize/deserialize code for me, I think.

Author: vkoskiv

src/lib/protocol/protocol.c

@@ -773,11 +773,6 @@ struct world *deserialize_scene(const cJSON *in) {
 		out->asset_path = stringCopy(asset_path->valuestring);
 	}
 
-	const cJSON *background = cJSON_GetObjectItem(in, "background");
-	if (cJSON_IsObject(background)) {
-		out->bg_desc = deserialize_shader_node(background);
-		out->background = build_bsdf_node((struct cr_scene *)out, out->bg_desc);
-	}
 	const cJSON *textures = cJSON_GetObjectItem(in, "textures");
 	if (cJSON_IsArray(textures)) {
 		cJSON *texture = NULL;
@@ -789,6 +784,12 @@ struct world *deserialize_scene(const cJSON *in) {
 		}
 	}
 
+	const cJSON *background = cJSON_GetObjectItem(in, "background");
+	if (cJSON_IsObject(background)) {
+		out->bg_desc = deserialize_shader_node(background);
+		out->background = build_bsdf_node((struct cr_scene *)out, out->bg_desc);
+	}
+
 	const cJSON *shader_buffers = cJSON_GetObjectItem(in, "shader_buffers");
 	if (cJSON_IsArray(shader_buffers)) {
 		cJSON *s_buffer = NULL;