BUG: io: fix integer division in dumbdbm_patched
BUG: linalg: fix integer division
BUG: ndimage: fix integer division
TST: sparse.linalg.arpack: fix integer division
TST: fftpack: fix integer division
BUG: signal: fix integer division
TST: cluster: fix some integer divisions
TST: sparse: silence ComplexWarnings at some points in tests
MAINT: remove some unnecessary int()
Merge pull request #420 from pv/fix-warnings

BUG: fix integer divisions + complexwarnings