Changed warning not displayed when line wasn't changed

```cpp
static int bar(int t)
{
const int buf[3]= {0};
return buf[t];
}
static int f(void)
{
int t;
return bar((t=5));
}
int main(void)
{
f();
}
```

The code above will show


If you change the line with the `t` assignment to `3` it will report


Both messages should be adjusted for the index but only the one where we changed the line is.

If you add a newline at the end of the file the other message is updated as well.


Note: I tested this with a standalone file (i.e. not belonging to any project).

I wonder if this might be related to #37.