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-rw-r--r--libguile/procprop.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/libguile/procprop.c b/libguile/procprop.c
index 8e234edbd..ff4648d00 100644
--- a/libguile/procprop.c
+++ b/libguile/procprop.c
@@ -72,11 +72,15 @@ scm_i_procedure_arity (SCM proc, int *req, int *opt, int *rest)
{
if (!SCM_SMOB_APPLICABLE_P (proc))
return 0;
- if (scm_i_program_arity (SCM_SMOB_DESCRIPTOR (proc).apply_trampoline,
- req, opt, rest))
- /* The trampoline gets the smob too, which users don't
- see. */
- *req -= 1;
+ if (!scm_i_program_arity (SCM_SMOB_DESCRIPTOR (proc).apply_trampoline,
+ req, opt, rest))
+ return 0;
+
+ /* The trampoline gets the smob too, which users don't
+ see. */
+ *req -= 1;
+
+ return 1;
}
else
return 0;