fix

Signed-off-by: Joe Isaacs <joe.isaacs@live.co.uk>

Author: joseph-isaacs

encodings/fastlanes/src/delta/array/mod.rs

@@ -11,6 +11,7 @@ use vortex_array::dtype::DType;
 use vortex_array::dtype::PType;
 use vortex_array::match_each_unsigned_integer_ptype;
 use vortex_array::stats::ArrayStats;
+use vortex_error::VortexExpect;
 use vortex_error::VortexResult;
 use vortex_error::vortex_ensure;