In addition to the general patch, DOC needs to check the locale
setting when it "bails out". The functions were identical other
than that, so use the shared function instead.

Change-Id: I705c5ed39cd07d0df4abb40c622da499375ce7b1
Reviewed-on: https://gerrit.libreoffice.org/66965
Tested-by: Jenkins
Reviewed-by: Justin Luth <justin_luth@sil.org>