Bug 104849

In the `desktop_file_to_binary` function of xdg-mime (version 1.1.2) line 323/325 there is an if statement in bash which checks if a directory exists (at least I think so). It uses an unquoted path which in my case contains forbidden characters in bash. Quoting this path fixes the issue.

Original source (line 323):
```
if [ -r $dir/applications/$vendor/$app ]; then
```

Fixed source (line 323):
```
if [ -r "$dir/applications/$vendor/$app" ]; then
```