[vala/0.50] testrunner: Add "-Werror=return-stack-address" flag

[Rico Tzschichholz <ricotz src gnome org>]

commit b62bec6a0e2560790c2e02313ff8a33afa979c60
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Thu Feb 4 15:53:55 2021 +0100

    testrunner: Add "-Werror=return-stack-address" flag

 configure.ac | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/configure.ac b/configure.ac
index 04f39797a..faa1b8c98 100644
--- a/configure.ac
+++ b/configure.ac
@@ -122,6 +122,7 @@ TEST_EXTRA_CFLAGS="-Werror=init-self \
 -Werror=pointer-arith \
 -Werror=redundant-decls \
 -Werror=return-local-addr \
+-Werror=return-stack-address \
 -Werror=return-type \
 -Werror=sequence-point \
 -Werror=uninitialized \