migration: Teach it about G_SOURCE_REMOVE

As this is defined on glib 2.32, add compatibility macros for older glibs.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

include/glib-compat.h

@@ -223,6 +223,8 @@ static inline gboolean g_hash_table_contains(GHashTable *hash_table,
 {
     return g_hash_table_lookup_extended(hash_table, key, NULL, NULL);
 }
+#define G_SOURCE_CONTINUE TRUE
+#define G_SOURCE_REMOVE FALSE
 #endif
 
 #ifndef g_assert_true

migration/exec.c

@@ -49,7 +49,7 @@ static gboolean exec_accept_incoming_migration(QIOChannel *ioc,
 {
     migration_channel_process_incoming(ioc);
     object_unref(OBJECT(ioc));
-    return FALSE; /* unregister */
+    return G_SOURCE_REMOVE;
 }
 
 void exec_start_incoming_migration(const char *command, Error **errp)

migration/fd.c

@@ -49,7 +49,7 @@ static gboolean fd_accept_incoming_migration(QIOChannel *ioc,
 {
     migration_channel_process_incoming(ioc);
     object_unref(OBJECT(ioc));
-    return FALSE; /* unregister */
+    return G_SOURCE_REMOVE;
 }
 
 void fd_start_incoming_migration(const char *infd, Error **errp)

migration/socket.c

@@ -154,7 +154,7 @@ static gboolean socket_accept_incoming_migration(QIOChannel *ioc,
 out:
     /* Close listening socket as its no longer needed */
     qio_channel_close(ioc, NULL);
-    return FALSE; /* unregister */
+    return G_SOURCE_REMOVE;
 }