D'oh.

src/fs.c

@@ -102,14 +102,14 @@ size_t enumerateDir(char ***output, char *path, char *pattern) {

    int i = 0; 
    while (fno.fname[0] != 0 && fr == FR_OK) {
        if (fno.fname[0] == '.') goto end;  
        if (fno.fname[0] == '.') goto next;  
        out = (char **)realloc(out, (i+1) * sizeof(char *));
        out[i] = (char *)malloc(FF_LFN_BUF);
        strcpy(out[i], pathb);
        strcat(out[i], fno.fname);
        pathb[pathlen+1] = 0;
        i++;
       end:
       next:
        f_findnext(&dp, &fno);
    }