use psp-un header when building for psp

src/serial.c

@@ -10,7 +10,11 @@
 #include "unix.h"
 
 #include <string.h>
+#ifndef PSP
 #include <sys/un.h>
+#else
+#include "psp-un.h"
+#endif
 
 /*
 Reuses userdata definition from unix.h, since it is useful for all

src/unixdgram.c

@@ -12,7 +12,11 @@
 #include <string.h>
 #include <stdlib.h>
 
+#ifndef PSP
 #include <sys/un.h>
+#else
+#include "psp-un.h"
+#endif
 
 #define UNIXDGRAM_DATAGRAMSIZE 8192
 

src/unixstream.c

@@ -10,7 +10,11 @@
 #include "unixstream.h"
 
 #include <string.h>
+#ifndef PSP
 #include <sys/un.h>
+#else
+#include "psp-un.h"
+#endif
 
 /*=========================================================================*\
 * Internal function prototypes