Because getInterfaces only returns the interfaces implemented by the class

(not by its superclasses), we need to rise through its superclasses as well
in order to find the provider interface.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@6411 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/main/java/com/threerings/presents/server/InvocationManager.java

@@ -132,11 +132,14 @@ public class InvocationManager
         // with legacy non-interface based providers)
         Class<?> pclass = provider.getClass();
         String pname = mclass.getSimpleName().replaceAll("Marshaller", "Provider");
-        for (Class<?> iclass : provider.getClass().getInterfaces()) {
-            if (InvocationProvider.class.isAssignableFrom(iclass) &&
-                iclass.getSimpleName().equals(pname)) {
-                pclass = iclass;
-                break;
+      OUTER:
+        for (Class<?> sclass = pclass; sclass != null; sclass = sclass.getSuperclass()) {
+            for (Class<?> iclass : sclass.getInterfaces()) {
+                if (InvocationProvider.class.isAssignableFrom(iclass) &&
+                    iclass.getSimpleName().equals(pname)) {
+                    pclass = iclass;
+                    break OUTER;
+                }
             }
         }