[vala/staging] (9 commits) ...vala: Allow assignment of 0U to enum types

[Rico Tzschichholz <ricotz src gnome org>]

Summary of changes:

  5c24e43... Release 0.44.0 (*)
  5c19009... gsignal: get_detail_cexpression/get_signal_name_cexpression
  abbdfdd... tests: Extend "detailed signal" test to increase coverage
  ed72aa2... gsignal: Use guint to represent flags-enum in custom GMarsh
  a8d1c68... gsignal: Move disconnect error from signal-module to semant
  371512e... tests: Extend "struct with delegate" test to increase cover
  0d09b1d... tests: Add "method ccode return-type" test to increase cove
  9199f6a... ccodegen: Use unsigned default value for flags-enum
  2703619... vala: Allow assignment of 0U to enum types

(*) This commit already existed in another branch; no separate mail sent