eigen: fix Projective * scaling and Projective *= scaling

Cherry-pick of commit 9ea0ed9

Bug 1304: fix Projective * scaling and Projective *= scaling

Bug: None
Test: None

Change-Id: I2a87251e52378681b7e8b68a915c740d604081c0
(cherry picked from commit 0149158f3614200cdb50095d83430aeb9ef35dca)
3 files changed