Fix crash in SVNClient when API Error occurs.

Review Request #7340 — Created May 27, 2015 and submitted — Latest diff uploaded

Information

RBTools
release-0.7.x
1841691...

Reviewers

This patch fixes a crash resulting from an UnboundLocalError when an
API error occurs while scanning for the remote repository.

rbt no longer crashes with the patch applied.

Ran unit tests.