buffer: add git_buf_clear

Set the size to zero so the memory that has already been allocated
can be reused

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/buffer.c b/src/buffer.c
index 6af4c9195..3cdc62f6d 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -93,3 +93,8 @@ void git_buf_free(git_buf *buf)
 {
 	free(buf->ptr);
 }
+
+void git_buf_clear(git_buf *buf)
+{
+	buf->size = 0;
+}