repack structs

Repack rb_thread_struct, rb_execution_context_struct, args_info and
iseq_compile_data to save 1 word per struct.

re_pattern_buffer remains unpacked due to the possible binary
compatibility.

[Fix GH-1907]

Based on the patch

From: Lourens Naudé <lourens@bearmetal.eu>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64096 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/iseq.h b/iseq.h
index eba17168eb..b8c10d8816 100644
--- a/iseq.h
+++ b/iseq.h
@@ -93,9 +93,9 @@ struct iseq_compile_data {
     VALUE ensure_node;
     VALUE for_iseq;
     struct iseq_compile_data_ensure_node_stack *ensure_node_stack;
-    int loopval_popped;	/* used by NODE_BREAK */
     struct iseq_compile_data_storage *storage_head;
     struct iseq_compile_data_storage *storage_current;
+    int loopval_popped;	/* used by NODE_BREAK */
     int last_line;
     int label_no;
     int node_level;