Fixed mistakes from previous commit

tree_alloc.c

@@ -131,8 +131,8 @@ void repair_tree_after_insert(TreeAlloc *ta) {
 		if (uncle != NULL && uncle->color == COLOR_RED) {
 			parent->color = COLOR_BLACK;
 			uncle->color = COLOR_BLACK;
-			grandparent = COLOR_RED;
-			repair_tree(grandparent);
+			grandparent->color = COLOR_RED;
+			repair_tree_after_insert(grandparent);
 		} else {
 				if (ta == parent->left && parent == grandparent->left) {
 						rotate_left(parent);