Honor the function return type.

diff --git a/src/thread.c b/src/thread.c
index ecc44f3f5f9fb69ede902d06d52971600405e273..cd59ce2533c6c1e7d67ef63a82cad2b6fd6c1134 100644 (file)
--- a/src/thread.c
+++ b/src/thread.c
@@ -123,6 +123,7 @@ DEFUN ("yield", Fyield, Syield, 0, 0, 0,
      (void)
 {
   thread_yield ();
+  return Qnil;
 }
 
 static Lisp_Object