(ports_allocate_port): Properly add PI to CLASS's port list when the

  list is empty.

1 files changed, 2 insertions, 1 deletions

diff --git a/libports/allocate-port.c b/libports/allocate-port.c
index 03839635..d3581db0 100644
--- a/libports/allocate-port.c
+++ b/libports/allocate-port.c
@@ -68,7 +68,8 @@ void *ports_allocate_port (struct port_bucket *bucket,
   assert_perror (err);
   pi->next = class->ports;
   pi->prevp = &class->ports;
-  class->ports->prevp = &pi->next;
+  if (class->ports)
+    class->ports->prevp = &pi->next;
   class->ports = pi;
   bucket->count++;
   class->count++;