Cope with both ATI stream and AMD APP SDK roots being set when building.
diff --git a/configure.ac b/configure.ac
index 769e7bd..8010e11 100644
--- a/configure.ac
+++ b/configure.ac
@@ -114,7 +114,9 @@ fi
if test "x$ATISTREAMSDKROOT" != x; then
OPENCL_FLAGS="-I$ATISTREAMSDKROOT/include $OPENCL_FLAGS"
OPENCL_LIBS="-L$ATISTREAMSDKROOT/lib/$ARCH_DIR $OPENCL_LIBS"
-elif test "x$AMDAPPSDKROOT" != x; then
+fi
+
+if test "x$AMDAPPSDKROOT" != x; then
OPENCL_FLAGS="-I$AMDAPPSDKROOT/include $OPENCL_FLAGS"
OPENCL_LIBS="-L$AMDAPPSDKROOT/lib/$ARCH_DIR $OPENCL_LIBS"
fi