BUILD: Free the a52 state in the configure compilation test

So ASan does not print a leak report in the middle of the configure
output when it is enabled.

1 files changed, 2 insertions, 1 deletions

diff --git a/configure b/configure
index b888e4745f..161551e616 100755
--- a/configure
+++ b/configure
@@ -4459,7 +4459,8 @@ extern "C" {
 }
 
 int main(void) {
-	a52_init(0);
+	a52_state_t *state = a52_init(0);
+	a52_free(state);
 	return 0;
 }
 EOF