patch 8.1.1116: cannot enforce a Vim script style

Problem:    Cannot enforce a Vim script style.
Solution:   Add the :scriptversion command. (closes #3857)
diff --git a/src/buffer.c b/src/buffer.c
index 33a7c66..b9b4488 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -5493,6 +5493,7 @@
 		current_sctx.sc_sid = SID_MODELINE;
 		current_sctx.sc_seq = 0;
 		current_sctx.sc_lnum = 0;
+		current_sctx.sc_version = 1;
 #endif
 		// Make sure no risky things are executed as a side effect.
 		secure = 1;