Fix pasto in ldns handling.

When ldns-config is not found, configure would check the wrong variable.
ok djm@

1 files changed, 1 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 3e8a232d9..d49660516 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1499,7 +1499,7 @@ AC_ARG_WITH(ldns,
         ldns=""
         if test "x$withval" = "xyes" ; then
                 AC_PATH_TOOL([LDNSCONFIG], [ldns-config], [no])
-                if test "x$PKGCONFIG" = "xno"; then
+                if test "x$LDNSCONFIG" = "xno"; then
                         CPPFLAGS="$CPPFLAGS -I${withval}/include"
                         LDFLAGS="$LDFLAGS -L${withval}/lib"
                         LIBS="-lldns $LIBS"