Setting keyboard maps in X leads to errors

After upgrading to yesterday's snapshot, I can no longer set keyboard
maps in X. This used to work as a simple sanity check:

```
xkbcomp $DISPLAY output.xkb
xkbcomp output.xkb $DISPLAY
```

but now the second command fails as follows:

```
<lots of warnings>
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  135 (XKEYBOARD)
  Minor opcode of failed request:  9 (XkbSetMap)
  Value in failed request:  0x195c0000
  Serial number of failed request:  109
  Current serial number in output stream:  115
```

I admit that I can't see any obvious changes in src or xenocara that
might explain this, but I haven't changed my hardware either, so I'm
rather confused!


Laurie