Merge pull request #4804 from kriswuollett/kriswuollett-protomethod-httppath-fix

Fixed proto method without package naming in ObjC.
diff --git a/src/objective-c/ProtoRPC/ProtoMethod.m b/src/objective-c/ProtoRPC/ProtoMethod.m
index 1113b4f..4b7ed63 100644
--- a/src/objective-c/ProtoRPC/ProtoMethod.m
+++ b/src/objective-c/ProtoRPC/ProtoMethod.m
@@ -46,7 +46,7 @@
 }
 
 - (NSString *)HTTPPath {
-  if (_package) {
+  if (_package && _package.length > 0) {
     return [NSString stringWithFormat:@"/%@.%@/%@", _package, _service, _method];
   } else {
     return [NSString stringWithFormat:@"/%@/%@", _service, _method];