node.h: Reduce struct size to fit with Ruby object size (five VALUEs)

by merging `rb_ast_body_t#line_count` and `#script_lines`.

Fortunately `line_count == RARRAY_LEN(script_lines)` was always
satisfied. When script_lines is saved, it has an array of lines, and
when not saved, it has a Fixnum that represents the old line_count.

1 files changed, 1 insertions, 2 deletions

diff --git a/compile.c b/compile.c
index 30c75119b2..4b967a87a0 100644
--- a/compile.c
+++ b/compile.c
@@ -1328,8 +1328,7 @@ new_child_iseq(rb_iseq_t *iseq, const NODE *const node,
 
     ast.root = node;
     ast.compile_option = 0;
-    ast.line_count = -1;
-    ast.script_lines = Qfalse;
+    ast.script_lines = INT2FIX(-1);
 
     debugs("[new_child_iseq]> ---------------------------------------\n");
     int isolated_depth = ISEQ_COMPILE_DATA(iseq)->isolated_depth;