[PATCH] Fix copy and pasto with autoconf script

The following diff is for the 1.2 branch to fix a copy and pasto when
I came up with the sndio autoconf test.

diff -r 22a7f096bb9d configure.in
— a/configure.in Sun Dec 01 00:00:17 2013 -0500
+++ b/configure.in Thu Dec 05 15:18:09 2013 -0500
@@ -503,7 +503,7 @@
SNDIO_LIBS="-lsndio"
fi

  •    AC_MSG_RESULT($have_nas)
    
  •    AC_MSG_RESULT($have_sndio)
    
       if test x$have_sndio = xyes; then
           AC_DEFINE(SDL_AUDIO_DRIVER_SNDIO)-- 
    

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