quaternion.h -> bug in function: set(f32 x, f32 y, f32 z)

[jox]

irr 0.6 - quaternion.h

There is a little typo in the translation from euler angles to quaternion at line 301:

Original code:

f32 cpcy = cp * cy;
f32 spcy = sp * cy;
f32 cpsy = cp * sy;
f32 spsy = cp * sy;

Fixed code:

f32 cpcy = cp * cy;
f32 spcy = sp * cy;
f32 cpsy = cp * sy;
f32 spsy = sp * sy; // <- cp should be sp

[niko]

thanks!