v0.7.10a1 breaks library loading on linux

[kiwec]

I'm using void linux, but this probably happens on other distros.

https://github.com/Zuzu-Typ/PyOpenAL/blob/master/openal/library_loader.py#L54

Basically, os.path.realname prepends the current directory to libopenal.so, which stops it from loading since that file doesn't exist.

>>> ctypes.CDLL(ctypes.util.find_library('openal'))
<CDLL 'libopenal.so', handle 55bd434836a0 at 0x7f317de76ba8>

>> ctypes.CDLL(os.path.realpath(ctypes.util.find_library('openal')))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.6/ctypes/__init__.py", line 348, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: /whatever/is/the/current/directory/libopenal.so: cannot open shared object file: No such file or directory

[Zuzu-Typ]

I'm sorry for your inconvenience.

I wasn't aware that find_library doesn't return the same result on different OSes.

I don't remember exactly why it was even necessary to use os.path.realpath in the first place.
Just in case I'll keep it for windows and discard it for others.

Thanks for the report!