Add S_MusicName back as a convenience function

* Move MUSICRATE to doomdef.h

src/doomdef.h

@@ -356,6 +356,8 @@ typedef enum
 #define NEWTICRATERATIO 1 // try 4 for 140 fps :)
 #define NEWTICRATE (TICRATE*NEWTICRATERATIO)
 
+#define MUSICRATE 1000 // sound timing is calculated by milliseconds
+
 #define RING_DIST 512*FRACUNIT // how close you need to be to a ring to attract it
 
 #define PUSHACCEL (2*FRACUNIT) // Acceleration for MF2_SLIDEPUSH items.

src/s_sound.c

@@ -1394,6 +1394,11 @@ musictype_t S_MusicType(void)
 	return I_SongType();
 }
 
+const char *S_MusicName(void)
+{
+	return music_name;
+}
+
 boolean S_MusicInfo(char *mname, UINT16 *mflags, boolean *looping)
 {
 	if (!I_SongPlaying())

src/s_sound.h

@@ -20,9 +20,6 @@
 #include "command.h"
 #include "tables.h" // angle_t
 
-// sound timing is calculated by milliseconds
-#define MUSICRATE 1000
-
 // mask used to indicate sound origin is player item pickup
 #define PICKUP_SOUND 0x8000
 
@@ -139,6 +136,7 @@ boolean S_MusicDisabled(void);
 boolean S_MusicPlaying(void);
 boolean S_MusicPaused(void);
 musictype_t S_MusicType(void);
+const char *S_MusicName(void);
 boolean S_MusicInfo(char *mname, UINT16 *mflags, boolean *looping);
 boolean S_MusicExists(const char *mname, boolean checkMIDI, boolean checkDigi);
 #define S_DigExists(a) S_MusicExists(a, false, true)