check the arguments like printf

Signed-off-by: Jianhui Zhao <zhaojh329@gmail.com>

example/example.c

@@ -47,10 +47,10 @@ static void default_handler(struct uh_connection *conn, int event)
         conn->send_head(conn, HTTP_STATUS_OK, -1, NULL);
         conn->chunk_printf(conn, "I'm Libuhttpd: %s\n", UHTTPD_VERSION_STRING);
         conn->chunk_printf(conn, "Method: %s\n", conn->get_method_str(conn));
-        conn->chunk_printf(conn, "Path: %.*s\n", path.len ,path.p);
-        conn->chunk_printf(conn, "Query: %.*s\n", query.len, query.p);
-        conn->chunk_printf(conn, "User-Agent: %.*s\n", ua.len, ua.p);
-        conn->chunk_printf(conn, "Body: %.*s\n", body.len, body.p);
+        conn->chunk_printf(conn, "Path: %.*s\n", (int)path.len ,path.p);
+        conn->chunk_printf(conn, "Query: %.*s\n", (int)query.len, query.p);
+        conn->chunk_printf(conn, "User-Agent: %.*s\n", (int)ua.len, ua.p);
+        conn->chunk_printf(conn, "Body: %.*s\n", (int)body.len, body.p);
         conn->chunk_end(conn);
         conn->done(conn);
     } else {

example/test_plugin.c

@@ -34,7 +34,7 @@ static void test_handler(struct uh_connection *conn, int event)
     path = conn->get_path(conn);
 
     conn->send_head(conn, 200, -1, NULL);
-    conn->chunk_printf(conn, "Path: %.*s\n", path.len, path.p);
+    conn->chunk_printf(conn, "Path: %.*s\n", (int)path.len, path.p);
     conn->chunk_end(conn);
 }