Invalid virtual address conversion

After loading const_102.wasm and sending `Inspect 0x12` to the debugger the VM crashes.

```
➜ 15:47 tolauwae core (fix/debugger-hex-floats) ✗ wdcli const_102.wasm 
Listening on port 127.0.0.1:8192
INVALID toVirtualAddress conversion: physicalAddr=(nil) WasmPhysicalAddr=0x5a6e821173d0 (Virtual address = 2112785456)
```