Don't complain about missing colon in empty DSN
Don't complain about missing colon in empty DSN

Empty datasource names occur with the datasource wizard's first page
when no datasource type has been selected yet.

Change-Id: I9bcd025aab046e6cb79db47564f55ae3f0faed55
Reviewed-on: https://gerrit.libreoffice.org/2885
Reviewed-by: Fridrich Strba <cc5239b4c84e795cbd430bca0f77cadba002516f@documentfoundation.org>
Tested-by: Fridrich Strba <cc5239b4c84e795cbd430bca0f77cadba002516f@documentfoundation.org>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core