Fix Normalize(<signed integer array>).#6837

Merged

tacaswell merged 2 commits intomatplotlib:masterfrom

anntzer:fix-integer-normalization

Aug 1, 2016

Commits on Jul 26, 2016

Fix Normalize(<signed integer array>).
anntzer
committed

Commits on Jul 27, 2016

Fix float normalization too (float32->float32).
anntzer
committed