dlls/winmm/winealsa/midi.c: Bug in MIDI_CMD_BENDER fixed

[Johannes Koch]

The pitch value was wrongly converted and has to be centered around zero.

Changelog
   Fixed pitch bending in the alsa midi driver.

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? patch.diff
Index: dlls/winmm/winealsa/midi.c
===================================================================
RCS file: /home/wine/wine/dlls/winmm/winealsa/midi.c,v
retrieving revision 1.16
diff -u -p -r1.16 midi.c
--- dlls/winmm/winealsa/midi.c	27 Apr 2005 09:39:56 -0000	1.16
+++ dlls/winmm/winealsa/midi.c	26 Jul 2005 21:31:05 -0000
@@ -833,7 +833,7 @@ static DWORD modData(WORD wDevID, DWORD 
 		snd_seq_ev_set_controller(&event, evt&0x0F, d1, d2);
 		break;
 	    case MIDI_CMD_BENDER:
-		snd_seq_ev_set_pitchbend(&event, evt&0x0F, ((WORD)d1 << 7) | (WORD)d2);
+		snd_seq_ev_set_pitchbend(&event, evt&0x0F, ((WORD)d2 << 7 | (WORD)d1) - 0x2000);
 		break;
 	    case MIDI_CMD_PGM_CHANGE:
 		snd_seq_ev_set_pgmchange(&event, evt&0x0F, d1);