* error.c (dump_decl): Fix type of default arguments for template
template parameters and nontype template parameters.
* parse.y (template_parm): Handle invalid default template
template arguments here.
* parse.y (template_parm): Use template_arg instead of PTYPENAME
for default template template argument.
* pt.c (coerce_template_parms): Merge default template argument
codes. Can treat RECORD_TYPE as template name if it is implicitly
created. Fix argument index in error message.
* typeck.c (comptypes): Merge template argument comparison codes in
TEMPLATE_TEMPLATE_PARM and RECORD_TYPE.
From-SVN: r17650
