JSONRPC failed

when use jsonrpc , Movie directory can't be enter. Log message in xbmc.log as:

19:37:10 T:2758789952 DEBUG: JSONRPC: Incoming request: {"jsonrpc":"2.0","id":"3722001967211620453","method":"Files.GetDirectory","params":{"directory":"/media/diske/Media/","media":"video","sort":{"ignorearticle":false,"method":"file","order":"ascending"},"properties":["mimetype","file"]}}
19:37:10 T:2758789952 DEBUG: JSONRPC: Calling files.getdirectory
19:37:10 T:2758789952 DEBUG: JSONRPC: Value does not match any of the enum values in type
19:37:10 T:2758789952 DEBUG: JSONRPC: Array element at index 0 does not match in type properties

Start by reproducing the Files.GetDirectory request from the issue and inspect the JSONRPC handling around the properties array, using xbmc.log output to confirm the failure. Done means the Movie directory can be entered through JSONRPC without the enum and property validation errors shown.

Written by the indexing model from the issue text.