[PATCH v4 4/6] coccinelle: add a rule to make "expression" code use FREE_AND_NULL()

[Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>]

A follow-up to the existing "type" rule added in an earlier
change. This catches some occurrences that are missed by the previous
rule.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
 contrib/coccinelle/free.cocci | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/contrib/coccinelle/free.cocci b/contrib/coccinelle/free.cocci
index 35fb992621..f2d97e755b 100644
--- a/contrib/coccinelle/free.cocci
+++ b/contrib/coccinelle/free.cocci
@@ -17,3 +17,10 @@ T *ptr;
 - free(ptr);
 - ptr = NULL;
 + FREE_AND_NULL(ptr);
+
+@@
+expression E;
+@@
+- free(E);
+- E = NULL;
++ FREE_AND_NULL(E);
-- 
2.13.1.508.gb3defc5cc