Log Message:
vala: update to 0.44.2.

Vala 0.44.2
===========
 * Various improvements and bug fixes:
  - ccodegen:
    + Resolve generics in sizeof-expression of parameter initializer
    + Move implicit GValue cast for comparison to BinaryExpression [#585063]
    + Use available *_unref functions in G_DEFINE_AUTOPTR_CLEANUP_FUNC
    + Move get_type_signature() to DataType
    + Move try_cast_variant_to_type() to GVariantModule.visit_cast_expression()
    + Don't create special GArray clear-func for non-null structs
    + Implement silent-cast for GLib.Variant [#767]
  - vala: Variadic parameters are not supported for async methods
  - vala: Report error for unsupported operator instead of assertion
  - girparser: Create correct output in get_default_lower_case_suffix() [#778]
  - libvaladoc: Handle missing Content.List.Bullet.ORDERED in switch
  - libvaladoc: Handle missing Run.Style.NONE in switch
  - Add explicit "default: break;" statements for coverage of \ 
enum-typed switch

 * Bindings:
  - glib-2.0: Don't annotate dedicated GLib.assert_*() with [Assert] [#769]
  - gio-2.0: Revert enum-typed flags parameters in Socket API [glib!728]
  - gobject-introspection-1.0: Fix TypeInfo and TypeTag method references
  - gstreamer: Update from 1.15.2+ git master
  - gstreamer-1.0: Fix TypeFind and TypeFindFactory method references [#778]
  - gtk4: Update to 3.94.0+f273eca7
  - vapi: Update GIR-based bindings