* java-tree.h (struct lang_decl): New macro
`DECL_FIXED_CONSTRUCTOR_P.' New field `fixed_ctor.'
* parse.y (build_instance_initializer): New function.
(add_instance_initializer): Use it.
(java_fix_constructors): Set `current_class' before fix pass.
(fix_constructors): Just return if already fixed. Move `super()'
invokation ahead. Use `build_instance_initializer.'
Fixes PR java/1315.