Fix HOMING_SINGLE_AXIS_COMMANDS bug

[stackola]

In motion_control.h, the 4th 5th and 6th axis homing cycles are defined as HOMING_CYCLE_A/B/C, but in system.c they were being referenced as HOMING_CYCLE_1/2/3

This lead to a compile time error when enabling the feature HOMING_SINGLE_AXIS_COMMANDS

[fra589]

hi @stackola,
Thanks for using grbl-Mega-5X and reporting bugs.
By the way, your patch work with simple axis config, but it is not compatible with cloning ant renaming axis new functionality.
So, I will not merge your pull proposal, I will correct this bug with cloning and renaming compatibility ASAP.
Thanks for your report.
@++;
Gauthier.

[stackola]

Understood, thanks for the feedback.
Will you let me know when you fixed it so I can see how the correct fix would have looked like?
Thank you

[fra589]

Hi @stackola,
I just pushed a fix for this bug, but I don't have real CNC compatible for testing this...
Can you test and report if it's OK ?
Thanks,
@++;
Gauthier.

[stackola]

@fra589, my CNC is in pieces right now, needed some redesign / reprinting. I'll let you know as soon as it's back together