make ruby bindings compile with newer ruby versions ... fix for #217

patch provided by rrd trac user.

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@1791 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/bindings/ruby/main.c b/bindings/ruby/main.c
index 408994f..4942277 100644 (file)
--- a/bindings/ruby/main.c
+++ b/bindings/ruby/main.c
@@ -38,7 +38,7 @@ string_arr string_arr_new(
     int       i;
 
     Check_Type(rb_strings, T_ARRAY);
-    a.len = RARRAY(rb_strings)->len + 1;
+    a.len = RARRAY_LEN(rb_strings) + 1;
 
     a.strings = malloc(a.len * sizeof(char *));
     a.strings[0] = "dummy"; /* first element is a dummy element */