vrend: improve vrend_state.inited checks

I am not sure what the check in vrend_renderer_init was previously for.
This gives it some sense.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>

src/vrend_renderer.c

@@ -5938,15 +5938,17 @@ int vrend_renderer_init(const struct vrend_if_cbs *cbs, uint32_t flags)
    virgl_gl_context gl_context;
    struct virgl_gl_ctx_param ctx_params;
 
-   if (!vrend_state.inited) {
+   if (vrend_state.inited)
+      return 0;
+
    vrend_state.inited = true;
    virgl_resource_table_init(vrend_renderer_get_pipe_callbacks());
    vrend_clicbs = cbs;
+
    /* Give some defaults to be able to run the tests */
    vrend_state.max_texture_2d_size =
          vrend_state.max_texture_3d_size =
          vrend_state.max_texture_cube_size = 16384;
-   }
 
 #ifndef NDEBUG
    vrend_init_debug_flags();
@@ -10468,6 +10470,9 @@ static void vrend_reset_fences(void)
 
 void vrend_renderer_reset(void)
 {
+   if (!vrend_state.inited)
+      return;
+
    if (vrend_state.sync_thread) {
       vrend_free_sync_thread();
       vrend_state.stop_sync_thread = false;