* p-valprint.c (pascal_val_print): Use TYPE_ERROR_NAME.

	* p-typeprint.c (pascal_type_print_base): Use TYPE_ERROR_NAME.
	* m2-valprint.c (m2_val_print): Use TYPE_ERROR_NAME.
	* gdbtypes.h (TYPE_ERROR_NAME): New macro.
	* f-valprint.c (f_val_print): Use TYPE_ERROR_NAME.
	* f-typeprint.c (f_type_print_base): Use TYPE_ERROR_NAME.
	* dwarf2read.c (tag_type_to_type): Create a new error type on
	failure.
	* c-valprint.c (c_val_print): Use TYPE_ERROR_NAME.
	* c-typeprint.c (c_type_print_base): Use TYPE_ERROR_NAME.