configure: Not all compilers understand -idirafter, use -I instead.
If this is a problem, we can write a test for the compiler flag, but shouldn't
we _always_ use our Khronos headers instead of depending on the system...?
diff --git a/configure.ac b/configure.ac
index 3cabdab..0fb7504 100644
--- a/configure.ac
+++ b/configure.ac
@@ -70,7 +70,7 @@
esac
dnl Set up the compiler and linker flags
-INCLUDE="-I$srcdir/include -idirafter $srcdir/src/video/khronos"
+INCLUDE="-I$srcdir/include -I$srcdir/src/video/khronos"
if test x$srcdir != x.; then
INCLUDE="-Iinclude $INCLUDE"
elif test -d .hg; then
