[TODO] error when compare house DB with RI filter active

[jsaintvanne]

@yguitton @jsaintvanne

one error when we try to compare to house DB with RI filter active :

error when using Use RI as filter optioWarning message:
replacing previous import 'xcms::plot' by 'graphics::plot' when loading 'CAMERA'
Note: you might want to set/adjust the 'sampclass' of the returned xcmSet object before proceeding with the analysis.
< -------- Experiment of 42 samples ------------------------------------ >
< -------- Instrument: GALAXY.GC --------------------------------------- >
< -------- Annotation using database of 1 spectra ---------------------- >
< -------- Using xcmsSet object - only doing annotation ---------------- >
< -------- Removing artefacts () --------------------------------------- >
< -------- Matching with database of standards ------------------------- >
Error in h(simpleError(msg, call)) :
error in evaluating the argument 'x' in selecting a method for function 'which': non-numeric argument to binary operator
Calls: runGC ... lapply -> FUN -> which -> outer -> .handleSimpleError -> h
Execution haltedn

[jsaintvanne]

Link with yguitton/metaMS#33