[vino] Include if.h before ifaddrs.h in configure test

[David King <davidk src gnome org>]

commit 619d175f001d2f0c151d0b6f0550905fbdb7aa91
Author: David King <amigadave amigadave com>
Date:   Sat Mar 5 12:33:37 2011 +0100

    Include if.h before ifaddrs.h in configure test
    
    The getifaddrs manpage states that if both <net/if.h> and <ifaddrs.h>
    are being included, <net/if.h> must be included before <ifaddrs.h>.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 8cf70c4..6c623a8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -295,8 +295,8 @@ AM_CONDITIONAL([VINO_HAVE_SELF_IFADDRS], [test "x$ac_cv_header_ifaddrs_h" != "xy
 # Not all distros follow this.
 AS_IF([test "x$ac_cv_header_ifaddrs_h" = "xyes"],
   [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
-    #include <ifaddrs.h>
     #include <net/if.h>
+    #include <ifaddrs.h>
     ]], [[
     struct ifaddrs *myaddrs;
     getifaddrs (&myaddrs);