[vte] app: Fix search next/prev button sensitivity

[Christian Persch <chpe src gnome org>]

commit 245eb0f38421137b8b8442dcd30a5d4730ec0816
Author: Christian Persch <chpe src gnome org>
Date:   Wed Dec 2 16:35:26 2020 +0100

    app: Fix search next/prev button sensitivity

 src/app/app.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/app/app.cc b/src/app/app.cc
index 54c31ee7..23a297bc 100644
--- a/src/app/app.cc
+++ b/src/app/app.cc
@@ -837,12 +837,12 @@ vteapp_search_popover_update_regex(VteappSearchPopover* popover)
                 vte_terminal_search_set_regex(popover->terminal, regex.get(), 0);
 
                 if (error.error()) {
-                        popover->has_regex = true;
+                        popover->has_regex = false;
                         popover->regex_pattern = pattern; /* adopt */
                         pattern = nullptr; /* adopted */
                         gtk_widget_set_tooltip_text(popover->search_entry, nullptr);
                 } else {
-                        popover->has_regex = false;
+                        popover->has_regex = true;
                         gtk_widget_set_tooltip_text(popover->search_entry, error.message());
                 }
         }