[easytag] Add APE tag "part" constant

[David King <davidk src gnome org>]

commit 5cb7ebb2d7f46855f6b34bd84068c86b304fe748
Author: Mathias Reineke <saihtam gmx net>
Date:   Mon Jul 8 10:44:19 2013 +0200

    Add APE tag "part" constant

 src/ape_tag.c              |    6 +++---
 src/libapetag/apetaglib.h  |    1 +
 src/libapetag/id3v2_read.c |    2 +-
 3 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/src/ape_tag.c b/src/ape_tag.c
index 602fa64..e7953c2 100644
--- a/src/ape_tag.c
+++ b/src/ape_tag.c
@@ -91,7 +91,7 @@ gboolean Ape_Tag_Read_File_Tag (gchar *filename, File_Tag *FileTag)
     /***************
      * Disc Number *
      ***************/
-    string = apefrm_getstr(ape_cnt, "Part");
+    string = apefrm_getstr (ape_cnt, APE_TAG_FIELD_PART);
     if (FileTag->disc_number == NULL)
         FileTag->disc_number = Try_To_Validate_Utf8_String(string);
 
@@ -229,9 +229,9 @@ gboolean Ape_Tag_Write_File_Tag (ET_File *ETFile)
      * Disc Number *
      ***************/
     if ( FileTag->disc_number && g_utf8_strlen(FileTag->disc_number, -1) > 0)
-        apefrm_add(ape_mem, 0, "Part", FileTag->disc_number);
+        apefrm_add (ape_mem, 0, APE_TAG_FIELD_PART, FileTag->disc_number);
     else
-        apefrm_remove(ape_mem,"Part");
+        apefrm_remove (ape_mem, APE_TAG_FIELD_PART);
 
     /********
      * Year *
diff --git a/src/libapetag/apetaglib.h b/src/libapetag/apetaglib.h
index f7330d9..2587f6d 100644
--- a/src/libapetag/apetaglib.h
+++ b/src/libapetag/apetaglib.h
@@ -85,6 +85,7 @@
 #define APE_TAG_FIELD_SUBTITLE          "Subtitle"
 #define APE_TAG_FIELD_ARTIST            "Artist"
 #define APE_TAG_FIELD_ALBUM             "Album"
+#define APE_TAG_FIELD_PART "Part"
 #define APE_TAG_FIELD_DEBUTALBUM        "Debut Album"
 #define APE_TAG_FIELD_PUBLISHER         "Publisher"
 #define APE_TAG_FIELD_CONDUCTOR         "Conductor"
diff --git a/src/libapetag/id3v2_read.c b/src/libapetag/id3v2_read.c
index 194f65d..f5e445e 100644
--- a/src/libapetag/id3v2_read.c
+++ b/src/libapetag/id3v2_read.c
@@ -78,7 +78,7 @@ struct id3vtwo2ape convert[] = {
     {ID3FID_ORIGFILENAME,      ID3FN_TEXT, "Original Filename",0},
     {ID3FID_ORIGLYRICIST,      ID3FN_TEXT, "Original Lyricist",0},
     {ID3FID_ORIGYEAR,          ID3FN_TEXT, "Original Artist",0},
-    {ID3FID_PARTINSET,         ID3FN_TEXT, "Part",0},
+    {ID3FID_PARTINSET, ID3FN_TEXT, APE_TAG_FIELD_PART, 0},
     {ID3FID_PLAYLISTDELAY,     ID3FN_TEXT, "Playlist Delay",0},
     {ID3FID_PUBLISHER,         ID3FN_TEXT, APE_TAG_FIELD_PUBLISHER,0},
     {ID3FID_RECORDINGDATES,    ID3FN_TEXT, APE_TAG_FIELD_RECORDDATE,0},