Blenlib: Assert when attempting to rotate point around vector and store result in the point

This isn't supported since there are subsequent reads to all point coordinates
after modification started.

Probably we need to create a temp copy of point, but that's like extra CPU
ticks.

source/blender/blenlib/intern/math_vector.c

@@ -890,6 +890,8 @@ void rotate_normalized_v3_v3v3fl(float out[3], const float p[3], const float axi
 
 void rotate_v3_v3v3fl(float r[3], const float p[3], const float axis[3], const float angle)
 {
+	BLI_assert(r != p);
+
 	float axis_n[3];
 
 	normalize_v3_v3(axis_n, axis);