wineoss.drv: Don't use autoheader styled define.

dlls/wineoss.drv/midi.c

@@ -74,10 +74,6 @@
 WINE_DEFAULT_DEBUG_CHANNEL(midi);
 
 #ifdef SNDCTL_SEQ_NRMIDIS
-#define HAVE_OSS_MIDI
-#endif
-
-#ifdef HAVE_OSS_MIDI
 
 typedef struct {
     int			state;                  /* -1 disabled, 0 is no recording started, 1 in recording, bit 2 set if in sys exclusive recording */
@@ -1642,7 +1638,7 @@ static DWORD modReset(WORD wDevID)
     return MMSYSERR_NOERROR;
 }
 
-#endif /* HAVE_OSS_MIDI */
+#endif /* SNDCTL_SEQ_NRMIDIS */
 
 /*======================================================================*
  *                  	    MIDI entry points 				*
@@ -1657,7 +1653,7 @@ DWORD WINAPI OSS_midMessage(UINT wDevID, UINT wMsg, DWORD_PTR dwUser,
     TRACE("(%04X, %04X, %08lX, %08lX, %08lX);\n",
 	  wDevID, wMsg, dwUser, dwParam1, dwParam2);
     switch (wMsg) {
-#ifdef HAVE_OSS_MIDI
+#ifdef SNDCTL_SEQ_NRMIDIS
     case DRVM_INIT:
         return OSS_MidiInit();
     case DRVM_EXIT:
@@ -1707,7 +1703,7 @@ DWORD WINAPI OSS_modMessage(UINT wDevID, UINT wMsg, DWORD_PTR dwUser,
 	  wDevID, wMsg, dwUser, dwParam1, dwParam2);
 
     switch (wMsg) {
-#ifdef HAVE_OSS_MIDI
+#ifdef SNDCTL_SEQ_NRMIDIS
     case DRVM_INIT:
         return OSS_MidiInit();
     case DRVM_EXIT: