[vala] GAsync: Add gio.h include in header for public async methods

[Jürg Billeter <juergbi src gnome org>]

commit 9897b157a8fbfbff535862695fa3c0919fee6783
Author: Didier 'Ptitjes <ptitjes free fr>
Date:   Fri Jul 17 10:45:07 2009 +0200

    GAsync: Add gio.h include in header for public async methods
    
    Signed-off-by: Didier 'Ptitjes <ptitjes free fr>

 codegen/valagasyncmodule.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/codegen/valagasyncmodule.vala b/codegen/valagasyncmodule.vala
index a33635f..22a81ac 100644
--- a/codegen/valagasyncmodule.vala
+++ b/codegen/valagasyncmodule.vala
@@ -194,6 +194,9 @@ internal class Vala.GAsyncModule : GSignalModule {
 	public override void visit_method (Method m) {
 		if (m.coroutine) {
 			source_declarations.add_include ("gio/gio.h");
+			if (!m.is_internal_symbol ()) {
+				header_declarations.add_include ("gio/gio.h");
+			}
 
 			// append the synchronous version
 			m.coroutine = false;