ptr_valid: test whether a ptr is valid.

[ccan] / ccan / ptr_valid / LICENSE

diff --git a/ccan/ptr_valid/LICENSE b/ccan/ptr_valid/LICENSE
new file mode 120000 (symlink)
index 0000000..2354d12
--- /dev/null
+++ b/ccan/ptr_valid/LICENSE
@@ -0,0 +1 @@
+../../licenses/BSD-MIT
\ No newline at end of file