Patch to quite another Mingw Build warning (mmsystem.h)

[Steven Edwards]

===================================================================
RCS file: /home/wine/wine/include/mmsystem.h,v
retrieving revision 1.49
diff -u -r1.49 mmsystem.h
--- mmsystem.h	10 Mar 2002 00:02:34 -0000	1.49
+++ mmsystem.h	25 Apr 2002 16:42:43 -0000
@@ -1335,9 +1335,11 @@
 #define MMIO_CREATERIFF         0x0020  /* mmioCreateChunk: make a LIST
chunk */
 #define MMIO_CREATELIST         0x0040  /* mmioCreateChunk: make a RIFF
chunk */

+#ifndef __MINGW__
 #define SEEK_SET   0
 #define SEEK_CUR   1
 #define SEEK_END   2
+#endif /* __MINGW__ */

#define MMIOM_READ      MMIO_READ       /* read */
 #define MMIOM_WRITE    MMIO_WRITE       /* write */

"Every revolution was once a thought in one man's mind"
- Ralph Waldo Emerson