[vala] (12 commits) ...semanticanalyzer: Transform replaced_nodes field into method

[Rico Tzschichholz <ricotz src gnome org>]

Summary of changes:

  1a1d042... parser: Accept comma-separated list in case-statements of s (*)
  64568b6... girwriter: Use local reference to current CodeContext (*)
  0c05b6e... vala: Use CodeContext.root instead of SemanticAnalyzer.root (*)
  2dc4778... Release taken references to CodeContext after using it (*)
  2127e9b... codegen: Don't hold reference of CodeContext in TypeRegiste (*)
  b1e9542... semanticanalyzer: Directly access local datatypes in check_ (*)
  0c07d03... codegen: Avoid silent casts if not needed (*)
  ccf5fd3... vala: Add dedicated CastExpression.silent() constructor (*)
  d1a346d... vala: Add dedicated BinaryExpression.chained() constructor (*)
  ae45d93... vala: Replace more public fields (*)
  abdb6f0... vala: Move next_lambda_id into LambdaExpression (*)
  c81d1f9... semanticanalyzer: Transform replaced_nodes field into metho (*)

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