patch 8.2.1826: Vim9: cannot use a {} block at script level
Problem: Vim9: cannot use a {} block at script level.
Solution: Recognize a {} block.
diff --git a/src/structs.h b/src/structs.h
index 094b736..103c70c 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -907,6 +907,7 @@
# define CSF_ELSE 0x0004 // ":else" has been passed
# define CSF_WHILE 0x0008 // is a ":while"
# define CSF_FOR 0x0010 // is a ":for"
+# define CSF_BLOCK 0x0020 // is a "{" block
# define CSF_TRY 0x0100 // is a ":try"
# define CSF_FINALLY 0x0200 // ":finally" has been passed