libpad: pad_free() accept and return NULLHEADmaster

Minor ergonimics change, originally I liked the idea of policing
programming errors like attempting to free a NULL pad.  But in
practice it's just more convenient to be free-like ignoring NULL
inputs, and while at it return a NULL pointer in case a reused
pointer needs to be NULL'd on free.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/pad.h b/src/pad.h
index e9927e8..7a7a4dc 100644
--- a/src/pad.h
+++ b/src/pad.h
@@ -23,7 +23,7 @@ typedef struct pad_t pad_t;
 
 pad_t * pad_new(unsigned chunk_size, unsigned flags);
 void pad_reset(pad_t *pad);
-void pad_free(pad_t *pad);
+pad_t * pad_free(pad_t *pad);
 void * pad_get(pad_t *pad, unsigned size);
 void pad_put(void *mem);