pike: fixed regression

- removed unnecessary NULL-return from mark_node() after previous commit

(cherry picked from commit 79fbb7c6df5d4c742b1283b752c2df0f51e77f09)
(cherry picked from commit b62a773c8f0c1daf1aa3d1cd57845d414eea5bac)

src/modules/pike/ip_tree.c

@@ -301,10 +301,6 @@ pike_ip_node_t* mark_node(unsigned char *ip,int ip_len,
 		}
 	}
 
-	if(node==NULL) {
-		return NULL;
-	}
-
 	LM_DBG("only first %d were matched!\n",byte_pos);
 	*flag = 0;
 	*father = 0;