lib32-libofa GCC-4.7 compatibility patch

--- a/examples/uselame.cpp	2006-05-10 19:05:51.000000000 +0100
+++ b/examples/uselame.cpp	2012-04-16 12:57:51.035989196 +0100
@@ -12,6 +12,7 @@
 #else
 #include <sys/wait.h>
 #endif
+#include <unistd.h>

 AudioData *loadWaveFile(char *file);

--- a/examples/wavefile.cpp	2006-05-10 19:05:56.000000000 +0100
+++ b/examples/wavefile.cpp	2012-04-16 12:57:37.439463775 +0100
@@ -11,6 +11,7 @@
 #include "io.h"
 #endif
 #include <fcntl.h>
+#include <unistd.h>

 static bool readBytes(int fd, unsigned char *buf, int size) {
     int ct = 0;