[util] Fix leaks

util/options.cc

diff --git a/util/options.cc b/util/options.cc
index 3a9496b..d2a3846 100644
--- a/util/options.cc
+++ b/util/options.cc
@@ -178,7 +178,7 @@
 	       GError    **error G_GNUC_UNUSED)
 {
   shape_options_t *shape_opts = (shape_options_t *) data;
-  g_free (shape_opts->shapers);
+  g_strfreev (shape_opts->shapers);
   shape_opts->shapers = g_strsplit (arg, ",", 0);
   return true;
 }

util/options.hh

diff --git a/util/options.hh b/util/options.hh
index 2485230..5d25d9e 100644
--- a/util/options.hh
+++ b/util/options.hh
@@ -155,7 +155,7 @@
   ~shape_options_t (void)
   {
     free (features);
-    g_free (shapers);
+    g_strfreev (shapers);
   }
 
   void add_options (option_parser_t *parser);