gifnass() problem

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* gianass = Get Integer From "Numbers And Spaces" String */
/* gianass(str[], lim) have to return an array with the integers
 * from a given string. */
/* str[] is that string and lim is the maximum number of digits */
int *gianass(char str[], int lim) {
    int strSize = strlen(str),
        curdig = 0, // current digit
        times = 0, // amount of integers
        a, // any use
        *got; // pointer to memory where the intergers will be allocated
    char    digit[lim];

    got = (int *) calloc(1, sizeof(int)); // allocating just one space
    for (a = 0; a < strSize; a++) {
        /* \/ it will take only numbers to digit[curdig] \/ */
        if (str[a] != ' ') {
            digit[curdig] = str[a];
            curdig++;
        }
        if (str[a] == ' ' && curdig != 0) {
            if (times != 0) { // if it's not the first time
                got = realloc(got, (times + 1) * sizeof(int)); // reallocate more memory
            }
            digit[curdig] = '\0'; // finish the digit

            /* \\  //                 \\  //
             *  \\// here is where the program crashes \\// */

            sscanf(digit, "%d", got[times]); // it would go get the integer to got
            times++; // after that, go to the next integer, if the for loop isn't over
            curdig = 0;
        }
    }
    return(got); // returns the 'got' address to the pointer that called this function
}

int main() {
    char *str; // THE string
    str = "10 20 30 40"; // example
    int *v;
    v = gianass(str, 3);
    printf("%d %d %d %d \n\n", v[0], v[1], v[2], v[3]); // testing =)

    system("pause");
    return(0);
}