Add returns to non-void functions.

Let me at least pretend I know what I'm doing in C.

test.c

@@ -1,15 +1,22 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <errno.h>
 
 #include <wsclient/wsclient.h>
 
 int onclose(wsclient *c) {
 	fprintf(stderr, "onclose called: %d\n", c->sockfd);
+	return 0;
 }
 
 int onerror(wsclient *c, wsclient_error *err) {
 	fprintf(stderr, "onerror: (%d): %s\n", err->code, err->str);
+	if(err->extra_code) {
+		errno = err->extra_code;
+		perror("recv");
+	}
+	return 0;
 }
 
 int onmessage(wsclient *c, wsclient_message *msg) {
@@ -19,12 +26,13 @@ int onmessage(wsclient *c, wsclient_message *msg) {
 
 int onopen(wsclient *c) {
 	fprintf(stderr, "onopen called: %d\n", c->sockfd);
+	libwsclient_send(c, "Hello onopen");
 	return 0;
 }
 
 int main(int argc, char **argv) {
 	//Initialize new wsclient * using specified URI
-	wsclient *client = libwsclient_new("ws://echo.websocket.org/");
+	wsclient *client = libwsclient_new("ws://localhost:8080");
 	if(!client) {
 		fprintf(stderr, "Unable to initialize new WS client.\n");
 		exit(1);