thodg/libgit2

diff --git a/src/vector.c b/src/vector.c
index aac4863..98aa7bb 100644
--- a/src/vector.c
+++ b/src/vector.c
@@ -32,6 +32,9 @@ GIT_INLINE(int) resize_vector(git_vector *v, size_t new_size)
 {
 	void *new_contents;
 
+	if (new_size == 0)
+		return 0;
+
 	new_contents = git__reallocarray(v->contents, new_size, sizeof(void *));
 	GITERR_CHECK_ALLOC(new_contents);