Currently, if you have the wrong smart card inserted, the agent requests you to insert the right card. It would be nice if it also did this when you don't have a card inserted at all.
Looking at line 111 of `agent/divert-scd.c`, in my limited knowledge of the code base, it looks like the logic test could be changed from:
```
if (!rc) {
```
to:
```
if (!rc || no_card) {
```
to achieve this?
The ternary operator on line 117 appears to already have the appropriate prompt ready to go, but the code path will never make it there (`rc` is only ever set when there is a card inserted, `no_card` is only set when there isn't a card present - the check above only checks `rc`)