Allow getting source slices smaller than source area #810
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Fixes #669. The line
if (iloc < slice_imin || iloc > slice_imax) continue;
wasn't having the desired effect becauseivec::operator>
(and <) only returns true if every dimension is strictly greater (or less). That meansivec{151, 153} > ivec{151, 151}
returnsfalse
(which caused writing past the end of an array).@stevengj @oskooi