remove 'non virtual destructor' warning

diff --git a/src/display/nr-filter-primitive.h b/src/display/nr-filter-primitive.h
index a2bd14b6119f1380c4a362e0c93247948944c6a8..4a7bdb140faa0f5d3b3102c033ed158ee8cbf485 100644 (file)
--- a/src/display/nr-filter-primitive.h
+++ b/src/display/nr-filter-primitive.h
@@ -21,6 +21,8 @@ namespace NR {
 class FilterPrimitive {
 public:
     FilterPrimitive();
+    virtual ~FilterPrimitive()
+        {}
     int render(NRPixBlock **pb, NRMatrix const *trans);
     virtual int render(NRPixBlock **pb, Matrix const &trans) = 0;
     virtual int get_enlarge(Matrix const &m);