Build error: "taking address of rvalue"

https://github.com/scribusproject/scribus/blob/bc6df290c5c3e065c6a26adbf5c76d3d11eead41/scribus/ui/colorsandfills.cpp#L934

The current SVN build (after the 'code cleanup' patch) fails:

```shell
<SNIP>Scribus/scribus/ui/colorsandfills.cpp:934:55: error: taking address of rvalue [-fpermissive]
  934 |         const ScPattern *pat = &dialogPatterns[pattern];
```