tree-wide: use coccinelle to patch a lot of code to use mfree()

This replaces this:

        free(p);
        p = NULL;

by this:

        p = mfree(p);

Change generated using coccinelle. Semantic patch is added to the
sources.

1 files changed, 6 insertions, 0 deletions

diff --git a/coccinelle/mfree.cocci b/coccinelle/mfree.cocci
new file mode 100644
index 0000000000..1389cd35db
--- /dev/null
+++ b/coccinelle/mfree.cocci
@@ -0,0 +1,6 @@
+@@
+expression p;
+@@
+- free(p);
+- p = NULL;
++ p = mfree(p);