Add patch_music.pk3

src/d_main.c

@@ -963,6 +963,7 @@ static void IdentifyVersion(void)
 		}
 
 		MUSICTEST("music.dta")
+		MUSICTEST("patch_music.pk3")
 #ifdef DEVELOP // remove when music_new.dta is merged into music.dta
 		MUSICTEST("music_new.dta")
 #endif