Fix shop limit permission.

src/main/java/com/alttd/playershops/listener/PlayerListener.java

@@ -70,7 +70,7 @@ public class PlayerListener extends EventListener {
                 } catch (Exception ignore) {}
             }
         }
-        if (buildPermissionNumber == -1)
+        if (buildPermissionNumber != -1)
             shopHandler.addPlayerLimit(player.getUniqueId(), buildPermissionNumber);
     }