Add a missing "explicit" to BiCubicInterpolator.
Add a missing "explicit" to BiCubicInterpolator.

The constructor was missing the explicit keyword.

Change-Id: I283ab15a0d2c4cb90f85926f2aa19fa968086320

DougFirErickson/ceres-solver,ysonggit/ceres-solver,whuaegeanse/ceres-solver,DougFirErickson/ceres-solver,whuaegeanse/ceres-solver,DougFirErickson/ceres-solver,whuaegeanse/ceres-solver,DougFirErickson/ceres-solver,whuaegeanse/ceres-solver,ysonggit/ceres-solver,ysonggit/ceres-solver,ysonggit/ceres-solver