A bug in dynamic library loading (Linux version)

```
What steps will reproduce the problem?

1. One or several codecs (e.g. libflac) are not installed in the system
2. No logging (-d key) specified in command line

What is the expected output? What do you see instead?

After a load of one of the codecs failed (file missing), the rest of codecs and
liblirc_client do not load too, despite the fact that the libraries are present.

What version of the product are you using? On what operating system?

squeezelite v1.8 on OpenWRT Linux (3.18 kernel)

Please provide any additional information below.

If before any call of dlopen() function make dummy call of dlerror() function,
the problem disappears
```

Original issue reported on code.google.com by `andrew1k...@gmail.com` on 16 Jun 2015 at 8:22