Emitter Angle gives incorrect results with >180 values

[corentinjaffre]

To the left Angle = 180, to the right Angle = 360

Tried with ellipsoid and point, and my old effects are broken. (with 1.12.12)

[paroj]

this property defines how far the emission angle can deviate away from this base direction.

so values > 180 do not make any sense. We could clamp the passed value to 180 though..