[vala/staging] testrunner: Add "-Werror=tautological-pointer-compare" flag

[Rico Tzschichholz <ricotz src gnome org>]

commit 9d5e4312d9c52957da8b21361c5290b7fa7f88ab
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue Jul 14 14:13:51 2020 +0200

    testrunner: Add "-Werror=tautological-pointer-compare" flag

 configure.ac | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/configure.ac b/configure.ac
index 87dbf8cfd..eee338c55 100644
--- a/configure.ac
+++ b/configure.ac
@@ -140,6 +140,7 @@ TEST_EXTRA_CFLAGS="-Werror=init-self \
 -Werror=missing-declarations \
 -Werror=missing-prototypes \
 -Werror=strict-prototypes \
+-Werror=tautological-pointer-compare \
 -Werror=address \
 -Werror=array-bounds \
 -Werror=enum-conversion"