[easytag] Support MP4 files with the AAC file extension

[David King <davidk src gnome org>]

commit 466181aa708d9cfee3682ba2d5a35f455e32b0bb
Author: David King <amigadave amigadave com>
Date:   Sat Dec 3 09:51:15 2016 +0000

    Support MP4 files with the AAC file extension
    
    https://bugzilla.gnome.org/show_bug.cgi?id=775559

 src/file_description.c        |    1 +
 tests/test-file_description.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/file_description.c b/src/file_description.c
index 9a2b684..146241d 100644
--- a/src/file_description.c
+++ b/src/file_description.c
@@ -53,6 +53,7 @@ const ET_File_Description ETFileDescription[] =
     { MP4_FILE, ".m4a", MP4_TAG}, /* Implemented by Michael Ihde. */
     { MP4_FILE, ".m4p", MP4_TAG}, /* Implemented by Michael Ihde. */
     { MP4_FILE, ".m4v", MP4_TAG},
+    { MP4_FILE, ".aac", MP4_TAG},
 #endif
 #ifdef ENABLE_WAVPACK
     { WAVPACK_FILE, ".wv", WAVPACK_TAG}, /* Implemented by Maarten Maathuis. */
diff --git a/tests/test-file_description.c b/tests/test-file_description.c
index 87c70ec..071ff5a 100644
--- a/tests/test-file_description.c
+++ b/tests/test-file_description.c
@@ -75,6 +75,7 @@ file_description_get_file_description (void)
         { "test.m4a", MP4_FILE, MP4_TAG },
         { "test.m4p", MP4_FILE, MP4_TAG },
         { "test.m4v", MP4_FILE, MP4_TAG },
+        { "test.aac", MP4_FILE, MP4_TAG },
 #else /* !ENABLE_MP4 */
         { "test.Mp4", UNKNOWN_FILE, UNKNOWN_TAG },
         { "test.mp4", UNKNOWN_FILE, UNKNOWN_TAG },