Edited Issue: [0.3.x]malloc call return error [14028]

```
>>> malloc = typedVar("MSVCR120D!malloc")
>>> print malloc
Void*(__cdecl)(UInt8B)
>>> addr = malloc( 100 )
Amd64MachineInfo::SetVal: unknown register 56 requested
Amd64MachineInfo::SetVal: unknown register 57 requested
>>> print addr
0
```

Expected: no error, returns valid address