[vala] (9 commits) Created branch wip/effectfree

[Luca Bruno <lucabru src gnome org>]

The branch 'wip/effectfree' was created.

Summary of new commits:

  6b482cf... Emit left-handed side of assignment when it's a field or pa
  7797547... codegen: Use lvalue of the assignment when emitting array a
  07966b4... codegen: Unset array_size_cvalue in load_variable
  23aac19... Add get_defined_variables in PostfixExpression
  9d4787e... Set parent_node of the expression of delete statements
  bb65fa5... Set parent_node of the postfix inner expression
  4d94ed4... Set lvalue to the inner expression of addressof expression
  b9424df... codegen: Add create_temp_value
  2d3f8e2... codegen: Use temporary variables in member access for possi