Add mouse delta fix for SMAC servers (faceit serverside, etc)

[dr3murr]

This should fix usercmd mousex/mousey for servers that check that.

[KurastikO]

nice commits man!

[rollraw]

nice converted pseudocode from popular p2c dump... also it should be before all functions that manipulate angles

static QAngle angDeltaView = { };

const Vector2D vecMouseDelta = M::AnglePixels(U::sensitivity->GetFloat(), U::m_pitch->GetFloat(), U::m_yaw->GetFloat(), pCmd->angViewPoint, angDeltaView);
pCmd->sMouseDeltaX = static_cast<short>(vecMouseDelta.x);
pCmd->sMouseDeltaY = static_cast<short>(vecMouseDelta.y);

// save angles for next tick
angDeltaView = pCmd->angViewPoint;

will be enough

[mkot2]

nice converted pseudocode from popular p2c dump... also it should be before all functions that manipulate angles

complain about it being pasted and then proceed to paste