Merge pull request #261 from javaJake/websocketclose

Only free conn if in client context.

src/civetweb.c

@@ -10974,9 +10974,9 @@ mg_close_connection(struct mg_connection *conn)
 		}
 		mg_free(client_ctx->workerthreadids);
 		mg_free(client_ctx);
+		(void)pthread_mutex_destroy(&conn->mutex);
+		mg_free(conn);
 	}
-	(void)pthread_mutex_destroy(&conn->mutex);
-	mg_free(conn);
 }