Add missing operation.
@@ -44,6 +44,7 @@ extern "C" {
# define IPP_OP_DISABLE_ALL_PRINTERS (ipp_op_t)0x0059
# define IPP_OP_ENABLE_ALL_PRINTERS (ipp_op_t)0x005A
# define IPP_OP_GET_SYSTEM_ATTRIBUTES (ipp_op_t)0x005B
+# define IPP_OP_GET_SYSTEM_SUPPORTED_VALUES (ipp_op_t)0x005C
# define IPP_OP_PAUSE_ALL_PRINTERS (ipp_op_t)0x005D
# define IPP_OP_PAUSE_ALL_PRINTERS_AFTER_CURRENT_JOB (ipp_op_t)0x005E
# define IPP_OP_RESUME_ALL_PRINTERS (ipp_op_t)0x0061
