32551:

Change some printf to cout

According to coding guidelines. Some printf:es are left
till std::format C17++ can be used.

* pt-bytecode-vm.cc: printf -> cout

32552:

Set uninitialized m_ip field

The field was not set during some circumstances
which could potentially give the wrong line number in
warnings and errors from the bytecode interpreter.

* stack-frame.cc: Default init to 0.

32553:

Do type check before static_cast to wrong type

The virtual function is_defined() was called on a pointer to octave_cached_value
, when the object actually was a octave_base_value. The type check call need to
be done on a pointer to the base class to be standard compliant.

* pt-bytecode-vm.cc: Comply

32554:

Replace public field with getter setter

Follow coding guidelines for m_compilation_failed.

* ov-usr_fcn.h: Def getter setter, hide field
* pt-bytecode-vm.cc: Use getter setter
* ov-fcn-handle.cc: Use setter