Function scale

scale(out: mat2, a: ReadonlyMat2, v: ReadonlyVec2): mat2
Scales the mat2 by the dimensions in the given vec2
Parameters
- out: mat2
  the receiving matrix
- a: ReadonlyMat2
  the matrix to rotate
- v: ReadonlyVec2
  the vec2 to scale the matrix by
Returns mat2
out