QTestLib: don't crash if data tag requested, none available

When specific test functions and data tags are requested from the
command line, a non-existing data tag will produce error output *iif*
data tags are available for the function. However, if no data tags are
available, element 0 in testData would be dereferenced, resulting in a
crash.

Special case the empty data tag, even if no tags are available, because
some loggers (e.g., the QXmlTestLogger) will output results with no tag
the same way as those with an empty data tag.

Reviewed-by: Morten Sørvig

0 files changed, 0 insertions, 0 deletions