Fix "Defer to solver" - and PHP warning ...

[nfreear]

PHP warning : undefined variable link:

Nick@~/workspace/player-packages/composer-suggest (master=)$ git diff

diff --git a/src/Suggest.php b/src/Suggest.php
index a0a10e4..507c731 100644
--- a/src/Suggest.php
+++ b/src/Suggest.php
@@ -162,7 +162,7 @@ EOF;
             } else {
                 // Defer to solver. TODO: ?
                 self::debug("Deferring duplicate <comment>{$name}</comment>");
-                $dups[] = $link;
+                $dups[ $name ] = $constraint;
             }
         }
         return $origin;