Re-add test line that I had thought was useless, but isn't

Justin Fichtner

2017-11-30 e73964b0ad7f080d398251157bd46255b0032783

 libscpi/inc/scpi/types.h

@@ -77,6 +77,7 @@
        SCPI_REG_OPERC, /* OPERation Status Condition Register */
        SCPI_REG_QUES, /* QUEStionable status register */
        SCPI_REG_QUESE, /* QUEStionable status Enable Register */
        SCPI_REG_QUESC, /* QUEStionable status Condition Register

        /* last definition - number of registers */
        SCPI_REG_COUNT