Fix for SDCC 4.2.3 (makes the firmware compile with SDCC at least up to current SDCC 4.4.0)

[spth]

Since SDCC 4.2.3, interrupt numbers need to be parenthesized. The attached patch fixes the firmware so it compiles with current SDCC.

sdcc_4_3_0_smbus_firmware.patch.gz

[othello777]

thanks! this works