RFR(S): 8028514: PPC64: Fix C++ Interpreter after '7195622: CheckUnhandledOops has limited usefulness now'

[Volker Simonis]

Hi,

could you please review the following small webrev which fixes the
CPP-interpreter after "CheckUnhandledOops" was re-enabled in the
fastdebug build:

http://cr.openjdk.java.net/~simonis/webrevs/8028514/

All the changes are in CPP-interpreter specific files or in code which
is protected by "#ifdef  CC_INTERP". Most changes just switch
old-style "(oop)"casts to new-style "cast_to_oop()" conversions.

Thank you and best regards,
Volker