ENH: fix one more warnings from mapnik

Modules/Filtering/VectorDataRendering/include/otbVectorDataStyle.h

@@ -25,6 +25,7 @@
 #if defined(__GNUC__) || defined(__clang__)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wshadow"
+#pragma GCC diagnostic ignored "-Wunused-parameter"
 #include <mapnik/map.hpp>
 #pragma GCC diagnostic pop
 #else