Fix desync caused by graphics drivers corrupting the SSE control register

[11EJDE11]

Some graphics drivers return from D3D9 calls with the calling thread's MXCSR modified and never restore it.

From the attached logs, the rounding mode is changed during that call:

Bad: SetVideoMode-after-SetDisplayMode MXCSR=7FA0(rc=ZERO) x87CW=0E7F(rc=ZERO,pc=53)
vs
Good: SetVideoMode-after-SetDisplayMode MXCSR=1FA0(rc=nearest) x87CW=0E7F(rc=ZERO,pc=53)

rc=ZERO means SSE math truncates instead of rounding to nearest. Phobos replaces INIClass::ReadDouble (0x5283D0) with an SSE implementation, so percentage values parse low on the affected machine:

[Sidebar]HarvesterCounter.ConditionRed=50%: 0.49999997 (should be 0.5)
[Road]Hover=75%: 0.74999994 (should be 0.75)

debug_bad.log
debug_good.log

Fixed by restoring the SSE control register (MXCSR) right after SetDisplayMode, which is where it actually gets flipped and before before INIClass::ReadDouble runs. Also restore it at the start of every logic frame in case it happens mid-game.

[github-actions]

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