gain.cpp in beeps-0.3

- old
+ new

@@ -3,10 +3,10 @@
 
 #include "beeps/ruby/processor.h"
 #include "defs.h"
 
-RUCY_DEFINE_WRAPPER_VALUE_FROM_TO(Beeps::Gain)
+RUCY_DEFINE_WRAPPER_VALUE_FROM_TO(BEEPS_EXPORT, Beeps::Gain)
 
 #define THIS  to<Beeps::Gain*>(self)
 
 #define CHECK RUCY_CHECK_OBJ(Beeps::Gain, self)