tree 98dc39c4b02ec7e5aeff7dfd92199ff1a12f5868
parent 695ae74ed11eaf772b7b9de2bd646394a62dfc10
author Wyatt Allen <wyatta@google.com> 1505501735 -0700
committer Wyatt Allen <wyatta@google.com> 1505502775 -0700

Handle cursor positions that don't yield addresses

The gr-diff-cursor#getAddress method returns null when it has no
position or no address corresponds to it's position. However, the
gr-diff-view#_onLineSelected method did not account for this case and
attempted to use null addresses to construct URLs when moving the cursor
to a "File" line of a diff.

With this change, the diff view neither uses line number nor the diff
side when constructing URLs if the cursor does not yield an address.

Change-Id: I628658295bca1f49e0c2d3484e2e0d01e71bcd91