vtest: initialize renderer when the client connects

Call vtest_init_renderer when the client connects, instead of before
the first command.  We want to make vtest_server_run_renderer the
main loop when we add multi-client support, and this makes things
simpler.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-By: Gert Wollny <gert.wollny@collabora.com>
Reviewed-By: Gurchetan Singh <gurchetansingh@chromium.org>

vtest/vtest_server.c

@@ -372,6 +372,11 @@ static void vtest_server_run_renderer(struct vtest_client *client)
 {
    int err, ret;
 
+   ret = vtest_init_renderer(server.ctx_flags, server.render_device);
+   if (ret) {
+      return;
+   }
+
    do {
       ret = vtest_wait_for_fd_read(client->in_fd);
       if (ret < 0) {
@@ -431,15 +436,12 @@ static int vtest_client_dispatch_commands(struct vtest_client *client)
          return 3;
       }
 
-      ret = vtest_init_renderer(server.ctx_flags, server.render_device);
+      ret = vtest_create_context(&client->input, client->out_fd,
-      if (ret >= 0) {
+                                 header[0], &client->context);
-         ret = vtest_create_context(&client->input, client->out_fd,
-                                    header[0], &client->context);
-      }
       if (ret < 0) {
          return 4;
       }
-      printf("%s: vtest initialized.\n", __func__);
+      printf("%s: client context created.\n", __func__);
       vtest_set_current_context(client->context);
       vtest_poll();