OTHER: Simplify idlist serialization as type is restricted.
OTHER: Simplify operands serialization as type is restricted.
OTHER: Refactor serializing collection operands.
OTHER: Remove unnecessary _valid() check when serializing lists/dicts.
OTHER: list/dict size is accessed in constant time.
BUG(2480): Replace int32 with int64 on the wire and in xmmstypes.
OTHER: Omit entry type if list is restricted.
OTHER: Allow list_restrict_type as long as it's the same type.
OTHER: Serialize coll idlist/operands as restricted lists.
BUG(2093): Added float support to xmmsv
OTHER: Stricter error handling in (de)serialization.
OTHER: Bump protocol version.
BUG(2555): Update g_(thread|mutex|cond)_ calls to GLib 2.32+ API.
OTHER: Bump src/lib/s4

* src/lib/s4 48487d9...57a2a92 (1):
  > BUG(2555): Update g_(thread|mutex|cond)_ calls to GLib 2.32+ API.