WebScriptUtil.extractHttpServletResponse() not working.
The extractHttpServletResponse method of the  WebScriptUtil falsy returns null.

Cause:
AnnotationWebscriptResponse
```
	@Override
	public WebScriptResponse getNext() {
		if (response instanceof WrappingWebScriptResponse) {
			return ((WrappingWebScriptResponse) response).getNext();
		} else {
			return null;
		}
	}
```
diff --git a/webscripts/src/main/java/com/github/dynamicextensionsalfresco/webscripts/AnnotationWebscriptResponse.java b/webscripts/src/main/java/com/github/dynamicextensionsalfresco/webscripts/AnnotationWebscriptResponse.java
index ba7dff76..8eefaa73 100644
--- a/webscripts/src/main/java/com/github/dynamicextensionsalfresco/webscripts/AnnotationWebscriptResponse.java
+++ b/webscripts/src/main/java/com/github/dynamicextensionsalfresco/webscripts/AnnotationWebscriptResponse.java
@@ -41,7 +41,7 @@ public class AnnotationWebscriptResponse implements WrappingWebScriptResponse {
 		if (response instanceof WrappingWebScriptResponse) {
 			return ((WrappingWebScriptResponse) response).getNext();
 		} else {
-			return null;
+			return response;
 		}
 	}
 
['webscripts/src/main/java/com/github/dynamicextensionsalfresco/webscripts/AnnotationWebscriptResponse.java']