New shutdown function.

src/neocomm.c

@@ -24,3 +24,7 @@ int NeoComm_init(unsigned int max_nodes) {
 		return 0;
 	return 1;
 }
+
+void NeoComm_shutdown() {
+	NeoComm_shutdown_nodes();
+}

src/nodes.c

@@ -40,7 +40,9 @@ int NeoComm_init_nodes(unsigned int max_nodes) {
 	return 1;
 }
 
-void NeoComm_deinit_nodes() {
+void NeoComm_shutdown_nodes() {
+	if(!node_list)
+		return;
 	free(node_list);
 	node_max = 0;
 	node_count = 0;