ensure statements are prepared before keys subsystem initialization

contrib/gana

@@ -1 +1 @@
-Subproject commit 79a1ebfdffab6b01137a4642161e907f89c5c535
+Subproject commit be874165f95694e52ded88090ac18d682b943f67

src/exchange/taler-exchange-httpd.c

@@ -1419,6 +1419,13 @@ run (void *cls,
     GNUNET_SCHEDULER_shutdown ();
     return;
   }
+  if (GNUNET_SYSERR ==
+      TEH_plugin->preflight (TEH_plugin->cls))
+  {
+    global_ret = EXIT_FAILURE;
+    GNUNET_SCHEDULER_shutdown ();
+    return;
+  }
   if (GNUNET_OK !=
       TEH_keys_init ())
   {

src/exchange/taler-exchange-httpd_keys.c

@@ -1711,7 +1711,8 @@ build_key_state (struct HelperState *hs,
                                           ksh);
   if (qs < 0)
   {
-    GNUNET_break (0);
+    GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR != qs);
+    GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
     destroy_key_state (ksh,
                        true);
     return NULL;