remove some remnants of the macro code in vision.c

source: https://github.com/DanielT/NitroHack/commit/1d0ff8282be42b8827bee775a1c9ba4b88a676f6
gargoyles turn into statues after death, like stone golems
remove workarounds for dice 3.0 compiler bugs

source: https://github.com/DanielT/NitroHack/commit/1f866002e268fc2b28630f6de8058ef7cad4bdc2