[gimp] app: a colon was missing after "Debug Policy" in preferences

[Michael Natterer <mitch src gnome org>]

commit 44ce8b4dd8ad08f0b73f6ad15b49a8a42829dca8
Author: Michael Natterer <mitch gimp org>
Date:   Sun Apr 1 13:58:42 2018 +0200

    app: a colon was missing after "Debug Policy" in preferences
    
    and it's "Debug policy" (capitalization).

 app/dialogs/preferences-dialog.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/dialogs/preferences-dialog.c b/app/dialogs/preferences-dialog.c
index e676ce3..7b45495 100644
--- a/app/dialogs/preferences-dialog.c
+++ b/app/dialogs/preferences-dialog.c
@@ -1236,7 +1236,7 @@ prefs_dialog_new (Gimp       *gimp,
   table = prefs_table_new (1, GTK_CONTAINER (vbox2));
 
   button = prefs_enum_combo_box_add (object, "debug-policy", 0, 0,
-                                     _("Debug Policy"),
+                                     _("Debug Policy:"),
                                      GTK_TABLE (table), 0, size_group);
 
   /* Check existence of gdb or lldb to activate the preference, as a