Patch to improve priority flags management

[jfernandez <jfernandez igalia com>]

Hi, 
I tried to implement a bit improvement of priority flags definition. 
A single flag replace the old 3 flags HIGH, NORMAL, LOW. This new flag will
be called PRIORITY_FLAGS and will be set to 1<<10|1<<9 to be used as bit mask.

A new enumeration is defined, TnyHeaderPriorityFlags, with all available priority
levels. 

Greetings,

-- 
Javier Fernández García-Boente
Ingeniero en Informática                 
mailto:jfernandez igalia com                    
Igalia http://www.igalia.com
Telf. +34 981 91 39 91  
Fax.  +34 981 91 39 49
 

Index: libtinymail/tny-shared.h
===================================================================
--- libtinymail/tny-shared.h	(revisión: 1825)
+++ libtinymail/tny-shared.h	(copia de trabajo)
@@ -55,6 +55,7 @@
 typedef void (*TnyTransferMsgsCallback) (TnyFolder *folder, GError **err, gpointer user_data);
 typedef void (*TnyStatusCallback) (gpointer self, const gchar *what, gint sofar, gint oftotal, gpointer user_data);
 typedef enum _TnyHeaderFlags TnyHeaderFlags;
+typedef enum _TnyHeaderPriorityFlags TnyHeaderPriorityFlags;
 typedef enum _TnyAlertType TnyAlertType;
 typedef enum _TnyFolderType TnyFolderType;
 typedef struct _TnySimpleList TnySimpleList;
Index: libtinymail/tny-header.h
===================================================================
--- libtinymail/tny-header.h	(revisión: 1825)
+++ libtinymail/tny-header.h	(copia de trabajo)
@@ -49,6 +49,7 @@
 typedef struct _TnyHeader TnyHeader;
 typedef struct _TnyHeaderIface TnyHeaderIface;
 typedef enum _TnyHeaderFlags TnyHeaderFlags;
+typedef enum _TnyHeaderPriorityFlags TnyHeaderPriorityFlags;
 #endif
 
 enum _TnyHeaderFlags 
@@ -62,14 +63,17 @@
 	TNY_HEADER_FLAG_CACHED = 1<<6,
 	TNY_HEADER_FLAG_PARTIAL = 1<<7,
 	TNY_HEADER_FLAG_EXPUNGED = 1<<8,
+	TNY_HEADER_FLAG_PRIORITY = 1<<9|1<<10,
+	/* Keep below 1<<12 (internally used bits) */
+};
+
+enum _TnyHeaderPriorityFlags 
+{
 	TNY_HEADER_FLAG_HIGH_PRIORITY = 1<<9|1<<10,
 	TNY_HEADER_FLAG_NORMAL_PRIORITY = 0<<9|0<<10,
 	TNY_HEADER_FLAG_LOW_PRIORITY = 0<<9|1<<10
-
-	/* Keep below 1<<12 (internally used bits) */
 };
 
-
 struct _TnyHeaderIface
 {
 	GTypeInterface g;