Throw extrapolation error also when interpolation is called with an AbstractVector

[SouthEndMusic]

Fixes #293.

[sathvikbhagavan]

What's the MWE for the issue here?

[SouthEndMusic]

Test simply with

using DataInterpolations

u = [1.0, 2.0]
t = [1.0, 2.0]
A = LinearInterpolation(u, t)
A([3.0])

Calling interpolation with a vector used to bypass _interpolate(A, t) with the extrapolation checks in it.