* cp-tree.h: Delete #defines for cp_error, cp_warning,
	cp_pedwarn, and cp_compiler_error.
	* call.c, class.c, cp-tree.h, cvt.c, decl.c, decl2.c, error.c,
	except.c, friend.c, init.c, lex.c, method.c, parse.y, pt.c,
	rtti.c, search.c, semantics.c, spew.c, tree.c, typeck.c,
	typeck2.c: Change calls to the above macros to use their
	language-independent equivalents: error, warning, pedwarn, and
	internal_error respectively.

From-SVN: r48140