Empty functions: only abort() calls in function bodies

[PeterMatula]

Some functions from sample.zip (probably Delphi) decompile (via RetDec IDA plugin) into functions with empty bodies with only abort() call and UNREACHABLE comment. E.g.

// Address range: 0x4169830c - 0x4169837c
int32_t sub_4169830C(void) {
    // 0x4169830c
    abort();
    // UNREACHABLE
}

int32_t TModuleEntry(int32_t a1, int32_t a2, int32_t a3, int32_t a4) {
    // 0x4169798c
    abort();
    // UNREACHABLE
}

[palant]

This is a duplicate of #169 I'd say.

[PeterMatula]

Fixed by merging #391 - see the added regression test.