couchdb-lucene JSONP patch

diff --git a/src/main/java/com/github/rnewson/couchdb/lucene/SearchRequest.java b/src/main/java/com/github/rnewson/couchdb/lucene/SearchRequest.java
index 12abf8a..a5d5966 100644
--- a/src/main/java/com/github/rnewson/couchdb/lucene/SearchRequest.java
+++ b/src/main/java/com/github/rnewson/couchdb/lucene/SearchRequest.java
@@ -254,11 +254,11 @@ public final class SearchRequest {
         if (debug) {
             headers.put("Content-Type", "text/plain;charset=utf-8");
             result.put("body", escape(json.toString(2)));
+        } else if (callback != null) {
+            headers.put("Content-Type", "text/plain;charset=utf-8");
+            result.put("body", String.format("%s(%s)", callback, json.toString()));
         } else {
-            if (callback != null)
-                result.put("json", String.format("%s(%s)", callback, json));
-            else
-                result.put("json", json);
+            result.put("json", json);
         }

         // Include headers.