oj.h in oj-1.0.2

- old
+ new

@@ -36,9 +36,11 @@
 #if 0
 } /* satisfy cc-mode */
 #endif
 #endif
 
+#define RSTRING_NOT_MODIFIED
+
 #include "ruby.h"
 #ifdef HAVE_RUBY_ENCODING_H
 // HAVE_RUBY_ENCODING_H defined for Ruby 1.9
 #define IVAR_HELPERS 1
 #include "ruby/encoding.h"