[glib] schema compiler: Don't store zero-valued flags

[Ryan Lortie <ryanl src gnome org>]

commit 833e389516b5e5b2271ed84c7b2036801c3100f1
Author: Ryan Lortie <desrt desrt ca>
Date:   Mon Oct 4 02:57:06 2010 -0400

    schema compiler: Don't store zero-valued flags
    
    Don't store the "none" value for flags into the compiled schema file.
    "none" should never appear as a value -- no flags set is indicated by an
    empty array.

 gio/glib-compile-schemas.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/gio/glib-compile-schemas.c b/gio/glib-compile-schemas.c
index 2c97261..f5e8d1c 100644
--- a/gio/glib-compile-schemas.c
+++ b/gio/glib-compile-schemas.c
@@ -107,6 +107,12 @@ enum_state_add_value (EnumState    *state,
       return;
     }
 
+  /* Silently drop the null case if it is mentioned.
+   * It is properly denoted with an empty array.
+   */
+  if (state->is_flags && value == 0)
+    return;
+
   if (state->is_flags && (value & (value - 1)))
     {
       g_set_error (error, G_MARKUP_ERROR,
@@ -121,7 +127,6 @@ enum_state_add_value (EnumState    *state,
    * If we loosen the one-bit-set restriction we need an overlap check.
    */
 
-
   strinfo_builder_append_item (state->strinfo, nick, value);
 }