vty/vector.c: Use string.h, not memory.h
diff --git a/src/vty/vector.c b/src/vty/vector.c
index 4012f24..aaff87d 100644
--- a/src/vty/vector.c
+++ b/src/vty/vector.c
@@ -25,7 +25,7 @@
 #include <osmocom/vty/vector.h>
 #include <osmocom/vty/vty.h>
 #include <osmocom/core/talloc.h>
-#include <memory.h>
+#include <string.h>
 
 void *tall_vty_vec_ctx;