patch 8.2.4634: Vim9: cannot initialize a variable to null_list
Problem: Vim9: cannot initialize a variable to null_list.
Solution: Give negative count to NEWLIST. (closes #10027)
Also fix inconsistencies in comparing with null values.
diff --git a/src/proto/vim9instr.pro b/src/proto/vim9instr.pro
index 76f3b21..52a7c79 100644
--- a/src/proto/vim9instr.pro
+++ b/src/proto/vim9instr.pro
@@ -36,8 +36,8 @@
int generate_LOCKCONST(cctx_T *cctx);
int generate_OLDSCRIPT(cctx_T *cctx, isntype_T isn_type, char_u *name, int sid, type_T *type);
int generate_VIM9SCRIPT(cctx_T *cctx, isntype_T isn_type, int sid, int idx, type_T *type);
-int generate_NEWLIST(cctx_T *cctx, int count);
-int generate_NEWDICT(cctx_T *cctx, int count);
+int generate_NEWLIST(cctx_T *cctx, int count, int use_null);
+int generate_NEWDICT(cctx_T *cctx, int count, int use_null);
int generate_FUNCREF(cctx_T *cctx, ufunc_T *ufunc, isn_T **isnp);
int generate_NEWFUNC(cctx_T *cctx, char_u *lambda_name, char_u *func_name);
int generate_DEF(cctx_T *cctx, char_u *name, size_t len);