Inherit gettext-domain from <schemalist>

When the <schema> doesn't have a 'gettext-domain' attribute, but
the <schemalist> does, use that one.

Bug #635640.

gio/glib-compile-schemas.c

@@ -1228,7 +1228,9 @@ start_element (GMarkupParseContext  *context,
                        OPTIONAL | STRING, "gettext-domain", &gettext_domain,
                        OPTIONAL | STRING, "extends", &extends,
                        OPTIONAL | STRING, "list-of", &list_of))
-            parse_state_start_schema (state, id, path, gettext_domain,
+            parse_state_start_schema (state, id, path,
+                                      gettext_domain ? gettext_domain
+                                                     : state->schemalist_domain,
                                       extends, list_of, error);
           return;
         }

gio/tests/Makefile.am

@@ -374,6 +374,7 @@ schema_tests = \
 	schema-tests/extending.gschema.xml				\
 	schema-tests/from-docs.gschema.xml				\
 	schema-tests/incomplete-list.gschema.xml			\
+	schema-tests/inherit-gettext-domain.gschema.xml			\
 	schema-tests/invalid-path.gschema.xml				\
 	schema-tests/key-in-list-indirect.gschema.xml			\
 	schema-tests/key-in-list.gschema.xml				\

gio/tests/gschema-compile.c

@@ -117,9 +117,11 @@ static const SchemaTest tests[] = {
   { "flags-bad-default",            NULL, "*<default> * not in the specified flags type*"       },
   { "flags-more-than-one-bit",      NULL, "*flags values must have at most 1 bit set*"          },
   { "flags-with-enum-attr",         NULL, "*<enum id='flags'> not (yet) defined*"               },
-  { "flags-with-enum-tag",          NULL, "*<flags id='flags'> not (yet) defined*"              }
+  { "flags-with-enum-tag",          NULL, "*<flags id='flags'> not (yet) defined*"              },
+  { "inherit-gettext-domain",       NULL, NULL                                                  }
 };
 
+
 int
 main (int argc, char *argv[])
 {

gio/tests/schema-tests/inherit-gettext-domain.gschema.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<schemalist gettext-domain="foo">
+  <schema id="bar">
+    <key name="baz" type="s">
+      <default l10n="messages" context="foobar">'value'</default>
+    </key>
+  </schema>
+</schemalist>