[Media_api] windows compile issues

[cecilio]

Hi Roger,

I am now updating the wxMidi wrapper for portmidi. So I downloaded the
latest portmidi package (17Jan07).

When opening portmidi.dsw with MSVC++ 7.0 (I now the file is for 6.0
but I never had problmes to import into 7.0) it complains about all
projects except: pormidi, portime and pm_dll. All the others fail to
open. Fortunately to me, I only need these three :-)

When trying to build these three projects (debug and release versions)
the results are:

	- portime debug, release: built OK
	- pm_dll debug, release: built OK

	- pormidi debug, release: both fail. The problem is caused by not
having defined NEWBUFFER. Apparently the code is designed to
necessarily define this constant. Otherwise functions pm_flush_sysex
and pm_read_bytes fail to compile:
 		- 'queue' is not a member of 'pm_internal_struct'
		- 'Pm_Enqueue' not defined
		
	If defining NEWBUFFER is optional the previous functions code should
be review to include some #ifdef NEWBUFFER statements.
	
	I included
	
	#ifndef NEWBUFFER
	    #define NEWBUFFER 1
	#endif
	
	in portmidi.h, at the beginning, after the TRUE, FALSE defines and
now portmidi built ok.

	
Now I will start testing. I will inform you if I find more issues.

Best regards,
Cecilio Salmeron