Improve argument validation in text_insert

1 files changed, 2 insertions, 0 deletions

diff --git a/text.c b/text.c
index fdcf1cf..650f095 100644
--- a/text.c
+++ b/text.c
@@ -504,6 +504,8 @@ static void change_free(Change *c) {
  *      \-+ <-- +-----+ <-- +---------------+ <-- +-/
  */
 bool text_insert(Text *txt, size_t pos, const char *data, size_t len) {
+	if (len == 0)
+		return true;
 	if (pos > txt->size)
 		return false;
 	if (pos < txt->lines.pos)