[Wine] multicore machines and libx11 crashes

[Dan Kegel]

I've even seen wineserver crashes from this:
../../src/xcb_io.c:378: _XAllocID: Assertion `ret != inval_id' failed.
wine: Assertion failed at address 0x70997832 (thread 0060), starting debugger...
X Error of failed request:  BadIDChoice (invalid resource ID chosen
for this connection)
  Major opcode of failed request:  55 (X_CreateGC)
  Resource id in failed request:  0x4801c8a
  Serial number of failed request:  27638
  Current serial number in output stream:  27639
Can't attach process 0008: error 5
wineserver crashed, please enable coredumps (ulimit -c unlimited) and restart.