Fixed two errors caused by incorrect merge of the rpc interface generator
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestRpcInterop.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestRpcInterop.cs
index 8731f93..030e31d 100644
--- a/src/ProtocolBuffers.Test/TestProtos/UnitTestRpcInterop.cs
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestRpcInterop.cs
@@ -1208,8 +1208,8 @@
       }

       

       public TMessage CallMethod<TMessage, TBuilder>(string methodName, pb::IMessageLite request, pb::IBuilderLite<TMessage, TBuilder> response)

-        where TMessage : IMessageLite<TMessage, TBuilder>

-        where TBuilder : IBuilderLite<TMessage, TBuilder> {

+        where TMessage : pb::IMessageLite<TMessage, TBuilder>

+        where TBuilder : pb::IBuilderLite<TMessage, TBuilder> {

         switch(methodName) {

           case "Search": return response.MergeFrom(implementation.Search((global::Google.ProtocolBuffers.TestProtos.SearchRequest)request)).Build();

           case "RefineSearch": return response.MergeFrom(implementation.RefineSearch((global::Google.ProtocolBuffers.TestProtos.RefineSearchRequest)request)).Build();