transposegraph function

//Make new list, copy rows/columns to column/rows of new graph
intList *transposeGraph(intList *origGraph, int n) {
    intList *adjVertices = calloc(n+1, sizeof (intList));

    if (n <= 0) {
        fprintf(stderr, "Enter a correct amount for vertices.\n");
        exit(1);
    }

    int h;
    for ( h = 0; h <= n; h++)
        adjVertices[h] = NULL;

    //Loop through original list, put old values into newly created list
    int i;
    for (i = 1; i <= n; i++) {
                while (origGraph[i] != NULL) {
                        intList temp = origGraph[i];
                        adjVertices[first(origGraph[i])] = cons(i, adjVertices[first(origGraph[i])]);
                        origGraph[i] = rest(origGraph[i]);
                        free(temp);
                }
    }

    return adjVertices;
}