add missing header from music.h
treea14a3e01eb18bf1f99f0a1e0ae686725e729950f
-rw-r--r-- 80 .gitignore
-rw-r--r-- 84 .gitmodules
-rw-r--r-- 4451 CREDITS.txt
-rw-r--r-- 1089 LICENSE.txt
-rw-r--r-- 303 Makefile
-rw-r--r-- 1937 README.txt
drwxr-xr-x - data
drwxr-xr-x - doc
drwxr-xr-x - scripts
drwxr-xr-x - src