[libgweather] locations: Allow a <city> not to have a <location>

[Bastien Nocera <hadess src gnome org>]

commit d2c3ea2f994f14c5cf0b9a90bb74b61d9507e45b
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Dec 8 19:06:44 2017 +0100

    locations: Allow a <city> not to have a <location>
    
    Which should hopefully mean that the nearest weather station would get
    picked up.

 data/locations.dtd |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/locations.dtd b/data/locations.dtd
index 86acbde..02984cb 100644
--- a/data/locations.dtd
+++ b/data/locations.dtd
@@ -8,7 +8,7 @@
 <!ELEMENT country (%name;, iso-code, fips-code+, pref-lang?, timezones, tz-hint?, 
(location|state|province|city)*) >
 <!ELEMENT state (%name;, fips-code+, tz-hint?, (location|city)*) >
 <!ELEMENT province (%name;, (location|city)*) >
-<!ELEMENT city (%name;, coordinates?, tz-hint?, location+) >
+<!ELEMENT city (%name;, coordinates?, tz-hint?, location*) >
 <!ELEMENT location (%name;, code, zone?, radar?, coordinates?) >
 <!ELEMENT named-timezone (%name;, timezones, tz-hint, code)>