[master] 3514c8179 Update vrt.h

[Nils Goroll]

commit 3514c817947eef69ee0d9cdd68e690aebf72da1b
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Mon Mar 22 16:14:52 2021 +0100

    Update vrt.h

diff --git a/include/vrt.h b/include/vrt.h
index 021d0613a..1d15464d7 100644
--- a/include/vrt.h
+++ b/include/vrt.h
@@ -53,6 +53,8 @@
  * Whenever something is deleted or changed in a way which is not
  * binary/load-time compatible, increment MAJOR version
  *
+ * NEXT (2021-09-15)
+	vrt_null_strands added
  * 13.0 (2021-03-15)
  *	Move VRT_synth_page() to deprecated status
  *	Add VRT_synth_strands() and VRT_synth_blob()