taglib: In case of taglib < 1.6, include id3v2tag.h.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit c684f60a227d61dbe0d0b49577934512524867ee)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

diff --git a/modules/meta_engine/taglib.cpp b/modules/meta_engine/taglib.cpp
index 6bc2926..6a0567a 100644
--- a/modules/meta_engine/taglib.cpp
+++ b/modules/meta_engine/taglib.cpp
@@ -74,6 +74,8 @@
 # define TAGLIB_HAVE_AIFF_WAV_H
 # include <aifffile.h>
 # include <wavfile.h>
+#else
+# include <id3v2tag.h>
 #endif
 
 #if TAGLIB_VERSION >= VERSION_INT(1,6,1) && defined(TAGLIB_WITH_MP4)