add virtual destructor to SrsRefer

trunk/src/app/srs_app_refer.cpp

@@ -27,6 +27,14 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_kernel_log.hpp>
 #include <srs_app_config.hpp>
 
+SrsRefer::SrsRefer()
+{
+}
+
+SrsRefer::~SrsRefer()
+{
+}
+
 int SrsRefer::check(std::string page_url, SrsConfDirective* refer)
 {
     int ret = ERROR_SUCCESS;

trunk/src/app/srs_app_refer.hpp

@@ -35,6 +35,9 @@ class SrsConfDirective;
 
 class SrsRefer
 {
+public:
+    SrsRefer();
+    virtual ~SrsRefer();
 public:
     /**
     * to check the refer.