[Bug 45121] Steam uses high CPU while idle

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=45121

--- Comment #4 from Filip Volejnik <f.volejnik at gmail.com> ---
Created attachment 61834
  --> https://bugs.winehq.org/attachment.cgi?id=61834
Patch for ptid mapping (by zfigura)

Coming from esync/dxvk discord, steam seems to search for it's other process
(with open_process calls) with ptid decreasing by 4, in a loop, in some cases.
This causes the high idle CPU usage. Zfigura authored this as a test to see if
it helps - and it does, for us who tested it there. I'm not sure if this is
upstreamable, but it's worth as a source of info, at least.

Sample of the problematic behavior (taken with WINEDBG=+server):
0034: open_process( pid=0033, access=00000400, attributes=00000000 )
0034: open_process() = 0 { handle=0128 }
0034: open_process( pid=0033, access=00000040, attributes=00000002 )
0034: open_process() = 0 { handle=01b0 }
003e: open_process( pid=0033, access=00000040, attributes=00000002 )
003e: open_process() = 0 { handle=01b0 }
0034: open_process( pid=0033, access=00000400, attributes=00000000 )
0034: open_process() = 0 { handle=01a8 }
0040: open_process( pid=0033, access=00000400, attributes=00000000 )
0040: open_process() = 0 { handle=0248 }
0040: open_process( pid=000e, access=00000410, attributes=00000000 )
0040: open_process() = 0 { handle=034c }
0040: open_process( pid=0010, access=00000410, attributes=00000000 )
0040: open_process() = 0 { handle=034c }
0040: open_process( pid=0013, access=00000410, attributes=00000000 )
0040: open_process() = 0 { handle=034c }
0040: open_process( pid=001e, access=00000410, attributes=00000000 )
0040: open_process() = 0 { handle=034c }
0040: open_process( pid=0023, access=00000410, attributes=00000000 )
0040: open_process() = 0 { handle=034c }
0040: open_process( pid=0033, access=00000410, attributes=00000000 )
0040: open_process() = 0 { handle=034c }
0040: open_process( pid=0033, access=00000040, attributes=00000002 )
0040: open_process() = 0 { handle=039c }
003e: open_process( pid=0033, access=00000040, attributes=00000002 )
003e: open_process() = 0 { handle=039c }
005c: open_process( pid=0033, access=00001000, attributes=00000000 )
005c: open_process() = 0 { handle=0388 }
....

This goes on forever

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