[PATCH] Correctly detect OpenAL

[Alistair Leslie-Hughes]

Older OpenAL alext.h doesn't include al.h/alc.h.

Signed-off-by: Alistair Leslie-Hughes <leslie_alistair at hotmail.com>
---
 configure.ac | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 7d2449f..2968b66 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1650,7 +1650,9 @@ if test "x$ac_cv_lib_openal" = xyes
 then
     AC_CACHE_CHECK([for openal-soft], ac_cv_have_openalsoft,
         AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-            [[#include <AL/alext.h>
+            [[#include <AL/al.h>
+#include <AL/alc.h>
+#include <AL/alext.h>
 LPALCRENDERSAMPLESSOFT x;]])],[ac_cv_have_openalsoft=yes],[ac_cv_have_openalsoft=no]))
 fi
 if test "x$ac_cv_have_openalsoft" != xyes
-- 
1.9.1