java: prefer null to YYSYMBOL_YYEMPTY

That's one nice benefit from using enums.

* data/skeletons/lalr1.java (YYSYMBOL_YYEMPTY): No longer define it.
Use 'null' instead.
* examples/java/calc/Calc.y, tests/local.at: Adjust.

1 files changed, 3 insertions, 0 deletions

diff --git a/TODO b/TODO
index 1e589ddc..6d5a1480 100644
--- a/TODO
+++ b/TODO
@@ -1,4 +1,7 @@
 * Bison 3.6
+** syntax_error_arguments
+Don't store the lookahead if !argv.
+
 ** Documentation
 - yyexpected_tokens in all the languages.
 - YYNOMEM