common.h in ruby-vpi-13.0.0

- old
+ new

@@ -22,9 +22,10 @@
 */
 
 #ifndef COMMON_H
 #define	COMMON_H
 
+  #include <stddef.h>
   #include "verilog.h"
 
 
   /**
     A wrapper for vpi_printf() which marks the given message as being emitted from Ruby-VPI and ends the message with a new line.