replace calls to assert with liboctave_panic functions liboctave * lo-error.h (liboctave_panic_impossible, liboctave_panic_if, liboctave_panic_unless): New macros. Replace all calls to assert with panic_if, panic_impossible, or panic_unless as appropriate. Include "lo-error.h" as needed. Don't include <cassert>. Affected files: Array-base.cc, Array-util.cc, Array.h, CSparse.cc, DiagArray2.cc, 1 DiagArray2.h, Sparse.cc, Sparse.h, dim-vector.h, idx-vector.cc, idx-vector.h, CollocWt.cc, Quad.cc, oct-rand.cc, qrp.cc, svd.cc, Sparse-perm-op-defs.h, and oct-sort.cc.