resolve: silence warning of unknown pats for -l/--list (BC)

It was introduced at 232de244ab6f to warn that "hg resolve" did nothing
meaningful. The warning seems not good for "hg resolve -l" because it is
rather like "hg status" or "hg files".

mercurial/commands.py

@@ -5328,7 +5328,7 b' def resolve(ui, repo, *pats, **opts):'
 
         ms.commit()
 
-        if not didwork and pats:
+        if not didwork and pats and not show:
             ui.warn(_("arguments do not match paths that need resolving\n"))
 
     finally:

tests/test-resolve.t

@@ -43,10 +43,11 b' resolve -l should contain unresolved ent'
   U file1
   U file2
 
-resolving an unknown path should emit a warning
+resolving an unknown path should emit a warning, but not for -l
 
   $ hg resolve -m does-not-exist
   arguments do not match paths that need resolving
+  $ hg resolve -l does-not-exist
 
 resolve the failure