Decoding Error getting Class Name

Was having issues trying to restore a dictionary representation.
Erroring because the length of the range was out of range.
`NSString *typeClassName = [typeAttribute substringWithRange:NSMakeRange(3, [typeAttribute length] - 4)];`

After debugging a bit...
```
if (![typeAttribute hasPrefix:@"T@"]) {
return originalValue;
}
```
Passes but the typeAttibute full string was "T@"
checking further this was on a property of "id" type.

I added a check
` BOOL lengthOK = ([typeAttribute length] > 5);`

and added:

```
if (!lengthOK) {
return originalValue;
}
```

and then things worked fine