[seahorse] hkp: Fix strncpy compiler warning

[Niels De Graef <nielsdg src gnome org>]

commit 6fd719ef9947f72a69dbfb7c0b1b075dc20a076d
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Thu Mar 4 22:29:35 2021 +0100

    hkp: Fix strncpy compiler warning
    
    The strncpy is meant to copy the zero-terminator, but apparently gcc
    thinks we might be wrong, so let's just be explicit about it and make
    the compiler happy.

 pgp/seahorse-hkp-source.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/pgp/seahorse-hkp-source.c b/pgp/seahorse-hkp-source.c
index 73f9e09e..1ccf5fb5 100644
--- a/pgp/seahorse-hkp-source.c
+++ b/pgp/seahorse-hkp-source.c
@@ -877,8 +877,7 @@ seahorse_hkp_source_export_async (SeahorseServerSource *source,
     g_autoptr(GTask) task = NULL;
     SoupURI *uri;
     g_autoptr(GHashTable) form = NULL;
-    gchar hexfpr[11];
-    gint i;
+    char hexfpr[11];
 
     task = g_task_new (self, cancellable, callback, user_data);
     closure = g_new0 (ExportClosure, 1);
@@ -900,8 +899,8 @@ seahorse_hkp_source_export_async (SeahorseServerSource *source,
     strncpy (hexfpr, "0x", 3);
 
     form = g_hash_table_new (g_str_hash, g_str_equal);
-    for (i = 0; keyids[i] != NULL; i++) {
-        const gchar *fpr = keyids[i];
+    for (int i = 0; keyids[i] != NULL; i++) {
+        const char *fpr = keyids[i];
         guint len;
         SoupMessage *message;
 
@@ -912,7 +911,8 @@ seahorse_hkp_source_export_async (SeahorseServerSource *source,
         if (len > 8)
             fpr += (len - 8);
 
-        strncpy (hexfpr + 2, fpr, 9);
+        strncpy (hexfpr + 2, fpr, 8);
+        hexfpr[10] = '\0';
 
         /* The get key URI */
         g_hash_table_insert (form, "op", "get");