Minor bug spotted in a Matlab test function

[hokiedsp]

Hi,

In v.0.9.13, there is a minor bug in vl_test_pattern.m. It calls vlfeat_root.m twice but this function appears to have been renamed to vl_root.m. Other m-files ought to be checked for the same/similar bugs due to file name changes.

[vedaldi]

Thanks. We are migrating the function from toolbox/test to a new `architecture' toolbox/xtest, so they are obsolete indeed.