Fix bug in handling 204 responses

Author: estiller

modules/swagger-codegen/src/main/resources/android-java/apiInvoker.mustache

@@ -365,8 +365,10 @@ public class ApiInvoker {
 
       int code = response.getStatusLine().getStatusCode();
       String responseString = null;
-      if(code == 204)
+      if(code == 204) {
         responseString = "";
+		return responseString;
+	  }
       else if(code >= 200 && code < 300) {
         if(response.getEntity() != null) {
           HttpEntity resEntity = response.getEntity();