Fix the build on 5.X.

Reported by:	pointyhat via erwin

audio/pulseaudio/files/patch-src_modules_oss-util.c

@@ -1,6 +1,6 @@
---- src/modules/oss-util.c.orig	Sun Apr 29 19:53:31 2007
-+++ src/modules/oss-util.c	Sun Apr 29 19:55:24 2007
-@@ -40,6 +40,22 @@
+--- modules/oss-util.c.orig	2007-11-08 21:45:25.000000000 -0500
++++ modules/oss-util.c	2008-01-09 17:00:45.000000000 -0500
+@@ -44,6 +44,22 @@
  
  #include "oss-util.h"
  
@@ -23,3 +23,15 @@
  int pa_oss_open(const char *device, int *mode, int* pcaps) {
      int fd = -1;
      int caps;
+@@ -300,7 +316,11 @@ static int get_device_number(const char 
+     int r;
+ 
+     if (!(p = rp = pa_readlink(dev))) {
++#ifdef ENOLINK
+         if (errno != EINVAL && errno != ENOLINK) {
++#else
++        if (errno != EINVAL) {
++#endif
+             r = -1;
+             goto finish;
+         }