Rasql_Nodata values are missing when encoding

[Bang Pham Huu]

When importing a coverage/collection with nodata_values (e.g: tiff file with nodata_value is 111) by wcst_import (see attchement for data and ingredient file). The nodata_values will be added when creating type for this collection, e.g:

CREATE TYPE aySFwgNWCjKIPPjJUvFtINhCaVjvbN AS SET (zXqOmsGrGOrtmRtPEwmeWGslBPdscF NULL VALUES [111:111])

However when run a encode rasql query from the imported coverage/collection with rasql

rasql -q 'select encode(c, "Gtiff") from test_import_implied_nodata as c' --out file

the output file will not have the nodata_values as the input file.

[Dimitar Misev]

Patch submitted.