Merge lp:~mvo/software-center/fix-crash-deb-file-size-calc into lp:software-center

[Michael Vogt]

This is a small branch that fixes a crash when a manually downloaded deb file is opened that is
not in the current apt cache. Its a result of trying to reproduce bug #982315 (which failed).

To test:
- download a deb like google-chrome-stable_current_amd64.deb that is not yet in the apt cache
- open it with software-center

In trunk the "Total size" never gets updated (and there is a exception on the terminal). With
this branch that is fixed.

[Gary Lasker (gary-lasker)]

Clean as a whistle. Thanks, mvo!

review: Approve

=== modified file 'softwarecenter/db/pkginfo_impl/aptcache.py'
--- softwarecenter/db/pkginfo_impl/aptcache.py	2012-03-26 13:31:07 +0000
+++ softwarecenter/db/pkginfo_impl/aptcache.py	2012-04-16 09:30:27 +0000
@@ -596,6 +596,10 @@
                 self._set_candidate_release(pkg, archive_suite)
             # now get the right version
             version = self._cache[p].candidate
+            # this can happen on e.g. deb packages that are not in the cache
+            # testcase: software-center google-chrome-stable_current_amd64.deb
+            if not version:
+                continue
             pkgs_to_install.append(version)
             # now do it
             deps_inst = self._try_install_and_get_all_deps_installed(