Empty title aborts blog editor

src/blog.c

@@ -195,6 +195,11 @@ void blog_write() {
     s_readstring(buffer, 64);
     s_printf("\r\n");
 
+    if (strlen(buffer) == 0) {
+        s_printf(get_string(39));
+        return;
+    }
+
     blog_subject = strdup(buffer);
 
     blog_entry = external_editor(gUser, "No-One", "No-One", NULL, 0, "No-One", "Blog Editor", 0, 1);