split internal.h into files

One day, I could not resist the way it was written.  I finally started
to make the code clean.  This changeset is the beginning of a series of
housekeeping commits.  It is a simple refactoring; split internal.h into
files, so that we can divide and concur in the upcoming commits.  No
lines of codes are either added or removed, except the obvious file
headers/footers.  The generated binary is identical to the one before.

1 files changed, 6 insertions, 0 deletions

diff --git a/gc.c b/gc.c
index 131ffb8246..6def78a105 100644
--- a/gc.c
+++ b/gc.c
@@ -559,6 +559,12 @@ typedef struct gc_profile_record {
 #endif
 } gc_profile_record;
 
+struct RMoved {
+    VALUE flags;
+    VALUE destination;
+    VALUE next;
+};
+
 #if defined(_MSC_VER) || defined(__CYGWIN__)
 #pragma pack(push, 1) /* magic for reducing sizeof(RVALUE): 24 -> 20 */
 #endif