build: allow compilation by C++ compiler

Jan Breuer

2023-02-01 6ae1b9875e0b804eabdeb10fda23fd8db5fc9f1c

 libscpi/src/ieee488.c

@@ -169,7 +169,7 @@
        switch (register_type) {
            case SCPI_REG_CLASS_STB:
            case SCPI_REG_CLASS_SRE:
                ;
            {
                scpi_reg_val_t stb = context->registers[SCPI_REG_STB] & ~STB_SRQ;
                scpi_reg_val_t sre = context->registers[SCPI_REG_SRE] & ~STB_SRQ;

@@ -183,8 +183,9 @@
                    context->registers[SCPI_REG_STB] &= ~STB_SRQ;
                }
                break;
            }
            case SCPI_REG_CLASS_EVEN:
                ;
            {
                scpi_reg_val_t enable;
                if(register_group.enable != SCPI_REG_NONE) {
                    enable = SCPI_RegGet(context, register_group.enable);
@@ -202,7 +203,9 @@
                    val &= ~(register_group.parent_bit);
                }
                break;
            }
            case SCPI_REG_CLASS_COND:
            {
                name = register_group.event;

                if(register_group.ptfilt == SCPI_REG_NONE && register_group.ntfilt == SCPI_REG_NONE) {
@@ -227,6 +230,7 @@
                    val = ((ptrans & ptfilt) | (ntrans & ntfilt)) | SCPI_RegGet(context, register_group.event);
                }
                break;
            }
            case SCPI_REG_CLASS_ENAB:
            case SCPI_REG_CLASS_NTR:
            case SCPI_REG_CLASS_PTR: