[epiphany] adblock: Fix wrong assertion in filters_initialized_cb

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 76f618718581bb3070be6bc89e029aba0604033f
Author: Adrian Perez de Castro <aperez igalia com>
Date:   Fri Sep 6 13:06:55 2019 +0300

    adblock: Fix wrong assertion in filters_initialized_cb
    
    The assertion was checking the contrary of what it should have.

 src/ephy-window.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/ephy-window.c b/src/ephy-window.c
index 51b0edc8d..cd105beda 100644
--- a/src/ephy-window.c
+++ b/src/ephy-window.c
@@ -2239,7 +2239,8 @@ filters_initialized_cb (EphyFiltersManager *filters_manager,
                         GParamSpec         *pspec,
                         EphyWindow         *window)
 {
-  g_assert (!ephy_filters_manager_get_is_initialized (filters_manager));
+  /* This function is only ever invoked after initialization has completed. */
+  g_assert (ephy_filters_manager_get_is_initialized (filters_manager));
 
   g_signal_handler_disconnect (filters_manager, window->filters_initialized_id);