Help with char*

[cic.lemur]

Please can some one help me point out what's wrong with the code below. There's an intermittent error when trying to push_back into the vector.

I need to use char* because an API I'll be using will be expecting char*

#include <iostream>
#include <vector>

using namespace std;

int main()
{

    char* s = "The quick brown fox jumps over the lazy dog The quick brown's fox jumps over's the lazy dog. The quick brown fox jumps over the lazy dog The quick brown fox jumps over the lazy dog";
    vector<char*> textarray;

    char* buffer;
    int firstpos = 0;
    int bsize = 0;

    for (int i = 0; i < strlen(s); i++)
    {
        if (s[i] == ' ')
        {
            bsize = i - firstpos + 1;

            if (bsize > 0)
            {
                buffer = new char[bsize];
                strncpy(buffer, &s[firstpos], bsize);
                buffer[bsize] = NULL;
                cout << "bsize: " << bsize << " " << strlen(buffer) << " (" << buffer << ")" << endl;
                //delete [] buffer;
                textarray.push_back(buffer);
            }

            firstpos = i + 1;
        }
    }

    for (int i=0; i < textarray.size(); i++)
    {
        cout << "deleted : " << textarray[i] << endl;
        delete [] textarray[i];
    }

    return 0;
}

ps. I'm using latest CodeBlocks with mingw