(svn r26556) -Codechange: use sources.list to tell a file shouldn't be built for a particular platform

source.list

@@ -1108,7 +1108,10 @@ music/null_m.cpp
 		#else
 			#if DOS
 			#else
-				music/extmidi.cpp
+				#if MORPHOS
+				#else
+					music/extmidi.cpp
+				#end
 			#end
 		#end
 	#end

src/music/extmidi.cpp

@@ -9,7 +9,6 @@
 
 /** @file extmidi.cpp Playing music via an external player. */
 
-#ifndef __MORPHOS__
 #include "../stdafx.h"
 #include "../debug.h"
 #include "../string_func.h"
@@ -135,5 +134,3 @@ void MusicDriver_ExtMidi::DoStop()
 	waitpid(this->pid, NULL, 0);
 	this->pid = -1;
 }
-
-#endif /* __MORPHOS__ */