add extern "C" guards; close #126

include/mruby/cdump.h

@@ -4,6 +4,13 @@
 ** See Copyright Notice in mruby.h
 */
 
+#ifndef MRUBY_CDUMP_H
+#define MRUBY_CDUMP_H
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 #include "mruby.h"
 #include <stdio.h>
 
@@ -12,3 +19,9 @@ int mrb_cdump_irep(mrb_state *mrb, int n, FILE *f,const char *initname);
 /* error code */
 #define MRB_CDUMP_OK                     0
 #define MRB_CDUMP_GENERAL_FAILURE        -1
+
+#if defined(__cplusplus)
+}  /* extern "C" { */
+#endif
+
+#endif  /* MRUBY_CDUMP_H */