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, 1 deletions

diff --git a/parse.y b/parse.y
index 47b63e810d..df16cf6236 100644
--- a/parse.y
+++ b/parse.y
@@ -6286,7 +6286,7 @@ yycompile0(VALUE arg)
         RB_OBJ_WRITE(p->ast, &p->ast->body.compile_option, opt);
     }
     p->ast->body.root = tree;
-    p->ast->body.line_count = p->line_count;
+    if (!p->ast->body.script_lines) p->ast->body.script_lines = INT2FIX(p->line_count);
     return TRUE;
 }