eclean: fix eb655cf for no deprecated pkgs

Previous commit, while fixes output for deprecated pkgs
I added and {distdir: {}} entry to the deprecated return
dict.
Place the dictionary update behind a check that there is something to
update it with.

Signed-off-by: Brian Dolbec <brian.dolbec@gmail.com>
Signed-off-by: Sam James <sam@gentoo.org>

Author: dol-sen

pym/gentoolkit/eclean/search.py

@@ -132,8 +132,9 @@ def findDistfiles(
         if (not destructive) or fetch_restricted:
             self.output("...non-destructive type search")
             pkgs, _deprecated = self._non_destructive(destructive, fetch_restricted)
-            # simulate the same structure as invalid binpkgs for list_pkgs()
-            deprecated.update({_distdir: _deprecated})
+            if _deprecated:
+                # use the same structure as invalid binpkgs for list_pkgs()
+                deprecated.update({_distdir: _deprecated})
             installed_included = True
         if destructive:
             self.output(
@@ -142,8 +143,9 @@ def findDistfiles(
             pkgs, _deprecated = self._destructive(
                 package_names, exclude, pkgs, installed_included
             )
-            # simulate the same structure as invalid binpkgs for list_pkgs()
-            deprecated.update({_distdir: _deprecated)
+            if _deprecated:
+                # use the same structure as invalid binpkgs for list_pkgs()
+                deprecated.update({_distdir: _deprecated})
         # gather the files to be cleaned
         self.output("...checking limits for %d ebuild sources" % len(pkgs))