lib: add vector_compact(), use after str splits

* Add function to move all data to the start of a vector by shifting
  over contiguous empty slots
* Use this function to remove empty slots leftover after
  frrstr_filter_vec

Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/vty.c b/lib/vty.c
index 803b1c408..9e9e90ef3 100644
--- a/lib/vty.c
+++ b/lib/vty.c
@@ -188,6 +188,7 @@ int vty_out(struct vty *vty, const char *format, ...)
 		vector lines = frrstr_split_vec(buf, "\n");
 
 		frrstr_filter_vec(lines, &vty->include);
+		vector_compact(lines);
 
 		/*
 		 * Consider the string "foo\n". If the regex is an empty string