ignerr: fix unused warning

The ignerr intrinsic macro generates code that has
an unused variable. We fix it by turning it into
a gensym, since unused warnings aren't generated
for gensyms.

* eval.c (unused_arg_s): New static variable.
(me_ignerr): Use the value of unused_arg_s instead
of error_s, for the argument of the catch clause.
(eval_init): gc-protect unused_arg_s.
(eval_late_init): New function in which we initialized
unused_arg_s. The gensym function cannot be used
during eval_init.

* eval.h (eval_late_init): Declared.

* lib.c (init): Call eval_late_init after some other
late initializations.

1 files changed, 1 insertions, 0 deletions

diff --git a/lib.c b/lib.c
index b3abef2e..f9b6ee30 100644
--- a/lib.c
+++ b/lib.c
@@ -14935,6 +14935,7 @@ void init(val *stack_bottom)
   parse_init();
   uw_late_init();
   less_tab_init();
+  eval_late_init();
 #if HAVE_SYSLOG
   syslog_init();
 #endif