Hello welcome on board.
Don't worry to ask.
The error you get is an internal compiler error. Let's wait for Pelle to analyze it.
Normally is due to an anomalous condition while optimizing code. As a workaround for now try to recompile without optimization, or readjusting the code.
Then some considerations:
-1 C arrays always starts from 0th element. If your intention was to act something like the BASIC option base it doesn't work in C.
-2 All PC X86 architectures are little-endian, and in any case doesn't influence the compilation.
-3 Keep care of code indentation to make it more readable.