[gtk/wip/chergert/glproto] clear in_draw when discarding batch

[Christian Hergert <chergert src gnome org>]

commit a786336d90645659f1bfc5d7119c5427460ccbda
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jan 10 20:15:49 2021 -0800

    clear in_draw when discarding batch

 gsk/next/gskglcommandqueue.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gsk/next/gskglcommandqueue.c b/gsk/next/gskglcommandqueue.c
index f0b6cc20e6..5956fb3637 100644
--- a/gsk/next/gskglcommandqueue.c
+++ b/gsk/next/gskglcommandqueue.c
@@ -378,6 +378,7 @@ gsk_gl_command_queue_end_draw (GskGLCommandQueue *self)
   if G_UNLIKELY (batch->draw.vbo_count == 0)
     {
       discard_batch (self);
+      self->in_draw = FALSE;
       return;
     }