Implement mixed type for operator::*=(scalar)

Submitted by Gael Guennebaud @ggael

Assigned to Nobody

Link to original bugzilla bug (#1416)
Version: 3.3 (current stable)

Description

As noted there: http://stackoverflow.com/questions/43477416/custom-type-matrix-int-in-eigen

operator::=(scalar) should be extended to match the generality of operator(scalar).

Blocking

#558 (closed)