bugfixes and cleanups for stream-events.

[lilypond.git] / lily / dispatcher-scheme.cc

diff --git a/lily/dispatcher-scheme.cc b/lily/dispatcher-scheme.cc
index 2a2720656c888e082a44adaaa1320781fbf2723a..8500cf9811d6ae347ae26e5a2dff62ce338fe03a 100644 (file)
--- a/lily/dispatcher-scheme.cc
+++ b/lily/dispatcher-scheme.cc
@@ -38,10 +38,11 @@ LY_DEFINE (ly_add_listener, "ly:add-listener",
   SCM_ASSERT_TYPE (l, list, SCM_ARG1, __FUNCTION__, "listener");
   SCM_ASSERT_TYPE (d, disp, SCM_ARG2, __FUNCTION__, "dispatcher");
   
-  for (int arg=SCM_ARG3; scm_is_pair (cl); cl = scm_cdr (cl), arg++)
+  for (int arg = SCM_ARG3; scm_is_pair (cl); cl = scm_cdr (cl), arg++)
     {
-      SCM_ASSERT_TYPE (scm_symbol_p (cl), cl, arg, __FUNCTION__, "symbol");
-      d->add_listener (*l, scm_car (cl));
+      SCM sym = scm_car (cl);
+      SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, arg, __FUNCTION__, "symbol");
+      d->add_listener (*l, sym);
     }
 
   return SCM_UNDEFINED;