mtu discovery padding added

FossilOrigin-Name: 391a17b2ab460b54a220c3e128578a37610e71f524b3d127316f201bf4dfd4af

src/cw/mlist_append.c

@@ -0,0 +1,31 @@
+#include <string.h>
+
+#include "mlist.h"
+
+struct mlistelem *mlist_append(mlist_t l, void *data)
+{
+	struct mlistelem *e;
+
+	e = malloc(sizeof(struct mlistelem) + l->data_size);
+
+	if (e == NULL)
+		return NULL;
+
+	memcpy(mlistelem_dataptr(e), data, l->data_size);
+
+	if (l->first == NULL) {
+		l->first = e;
+		l->last = e;
+		e->prev=NULL;
+		e->next=NULL;
+		l->count++;
+		return e;
+	}
+	
+	l->last->next=e;
+	e->prev=l->last;
+	e->next=NULL;
+	l->last=e;
+	l->count++;
+	return e;
+}