If the replacement string size is not equal to the needle size zrepstr overwrites other charecters

[rilysh]

Hello,

If the replacement string size (y) is not equal to the needle size (x) zrepstr(...) function overwrites other characters.

For example,

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

#include "zrepstr.h"

int main()
{
    char str[50] = {0};

    snprintf(str, sizeof(str), "My simple text message");
    zrepstr(str, "text", "more than text");
    fprintf(stdout, "%s\n", str);
}

Where "more than text" overwrite the "message" string and it becomes something like this, "My simple more than te".