Sound does not play in koules due to removal of OSS API

I just tested koules on Ubuntu 18.04.6 LTS

Running
```
sudo apt install koules
koules
```
gives
```
X: Screen doesn't support PseudoColor!
Shm mode seems to be possible
Allocating palette
X Error of failed request: BadName (named color or font does not exist)
  Major opcode of failed request: 45 (X_OpenFont)
  Serial number of failed request: 13
  Current serial number in output stream: 19
32- 2
koules.sndsrv: shutting down
```
It seems there is a missing font which should be a dependency of the package.

I ran it with gdb, the line causing the issue is
setcustompalette (0, 1);
specifically
if (setcustompalette1 (ncolor))
which calls
if (!useprivate && !XAllocColor (dp, colormap, &color))
with colormap = 32

I also ran it within
Xephyr -screen 800x600x8 :1
to ensure PseudoColor was available:
```
X4GW 1.21.21 professional
Copyright(c)1991,1992,1993,1994,1995 Jan Hubicka(JAHUSOFT)
Initializing sound server...
Autoprobing hardware
Initializing joystick driver
Joystick driver not avaiable(recompile koules with JOYSTICK enabled )
Connecting X server
Shm mode seems to be possible
Allocating pallette
X Error of failed request: BadName (named color or font does not exist)
  Major opcode of failed request: 45 (X_OpenFont)
  Serial number of failed request: 12
  Current serial number in output stream: 18
32-2
koules.sndsrv: shutting down
```

Even thought the Pseudocolor error disappears, the XAllocColor remains.

Some more information: The error in the messages above are from a machine with Intel Graphics: Intel Corporation HD Graphics 620 (rev 02).

I also tested it in a machine with an nVidia card, and the game runs correctly there. I think the issue is Intel not supporting 8-bit color modes correctly.