stop allocating so much memory for nothing (c is hard)

src/Layout.c

@@ -96,7 +96,7 @@ css_node_t *new_css_node() {
 }
 
 void new_css_node_children(css_node_t *node, unsigned int children_count) {
-  node->children = malloc(children_count * sizeof(css_node_t));
+  node->children = malloc(children_count * sizeof(css_node_t *));
   for (unsigned int i = 0; i < children_count; ++i) {
     node->children[i] = new_css_node();
   }