[libgweather] tests: Add comment to named-timezones test

[Bastien Nocera <hadess src gnome org>]

commit 6969e4988049af9f29c38aa34b5551f0215340d8
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Dec 6 14:45:12 2017 +0100

    tests: Add comment to named-timezones test
    
    Not that interesting, but useful nonetheless.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791307

 libgweather/test_libgweather.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libgweather/test_libgweather.c b/libgweather/test_libgweather.c
index 6d9f56e..d51de20 100644
--- a/libgweather/test_libgweather.c
+++ b/libgweather/test_libgweather.c
@@ -41,6 +41,7 @@ test_named_timezones (void)
         if (level != GWEATHER_LOCATION_NAMED_TIMEZONE)
             continue;
 
+        /* Verify that timezone codes start with a '@' */
         code = gweather_location_get_code (children[i]);
         g_assert_nonnull (code);
         g_assert_true (code[0] == '@');