Other: Make sure that util.Long is overridden by AMD loaders only if present, see #730

Author: dcodeIO

lib/prelude.js

@@ -18,8 +18,10 @@
     // Be nice to AMD
     if (typeof define === "function" && define.amd)
         define(["long"], function(Long) {
-            protobuf.util.Long = Long;
-            protobuf.configure();
+            if (Long && Long.fromValue) {
+                protobuf.util.Long = Long;
+                protobuf.configure();
+            }
             return protobuf;
         });