[balsa] address-book-rubrica: Do not leak the completion

[Peter Bloomfield <peterb src gnome org>]

commit 84b866ad2da8687559780d73ad74013de565319d
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Thu Feb 14 15:48:50 2019 -0500

    address-book-rubrica: Do not leak the completion

 libbalsa/address-book-rubrica.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/libbalsa/address-book-rubrica.c b/libbalsa/address-book-rubrica.c
index 3b35750b5..6064fa825 100644
--- a/libbalsa/address-book-rubrica.c
+++ b/libbalsa/address-book-rubrica.c
@@ -127,6 +127,8 @@ libbalsa_address_book_rubrica_init(LibBalsaAddressBookRubrica * ab_rubrica)
     ab_text->item_list = NULL;
     ab_text->mtime = 0;
 
+    if (ab_text->name_complete != NULL)
+        libbalsa_completion_free(ab_text->name_complete);
     ab_text->name_complete =
         libbalsa_completion_new((LibBalsaCompletionFunc)
                                 completion_data_extract);