Make Integer#zero? a separated method and builtin (#3226)

A prerequisite to fix https://bugs.ruby-lang.org/issues/15589 with JIT.
This commit alone doesn't make a significant difference yet, but I thought
this commit should be committed independently.

This method override was discussed in [Misc #16961].

1 files changed, 1 insertions, 0 deletions

diff --git a/inits.c b/inits.c
index 4e5d65ab85..ad57b754a4 100644
--- a/inits.c
+++ b/inits.c
@@ -82,6 +82,7 @@ rb_call_builtin_inits(void)
 {
 #define BUILTIN(n) CALL(builtin_##n)
     BUILTIN(gc);
+    BUILTIN(integer);
     BUILTIN(io);
     BUILTIN(dir);
     BUILTIN(ast);