compile nuklear.h to lib

[rjopek]

Hi,

attempts to execute lib from nuklear.h with no success. Maybe there is way to disable those assert macros altogether with a flag? the case only applies to Windows 10.

it was talked about here: https://github.com/Immediate-Mode-UI/Nuklear/issues/320

it looks odd to use -1 as an array index, as it instantly results in a buffer underrun.