The simple_compression in examples fails with SIGSEGV，using a special set of use caces

[zh-wen]

The simple_compression demo in examples fails with SIGSEGV，using a special set of use caces.

To Reproduce

1. enter examples directory, ~/zstd-1.5.5/examples
2. generate data

#include <stdio.h>
#include "common.h"

int main()
{
    char cBuff[8192];
    int i = 0;
    for ( i = 0; i < 8192; i++)
    {
        cBuff[i] = (char)i % 16;
    }
    size_t cSize = 8192;
    saveFile_orDie("./test_data", cBuff, cSize);
    return 0;
}

3. Run simple_compression in examples.
   ./simple_compression test_data

Expected behavior
will coredump

stack
#0 0x000000000046dda3 in FSE_buildCTable_wksp ()
#1 0x000000000041461b in ZSTD_buildCTable ()
#2 0x0000000000406fa3 in ZSTD_buildSequencesStatistics ()
#3 0x0000000000407aae in ZSTD_entropyCompressSeqStore.clone.1 ()
#4 0x000000000040b882 in ZSTD_compressBlock_internal ()
#5 0x000000000040bc51 in ZSTD_compressContinue_internal ()
#6 0x0000000000411258 in ZSTD_compressEnd_public ()
#7 0x0000000000412886 in ZSTD_compress ()
#8 0x0000000000401007 in compress_orDie ()
#9 0x00000000004011f0 in main ()

Environment

• OS: CentOS Linux release 6.2 (Final)
• Version：libc-2.12.so
• Compiler: gcc (GCC) 4.4.6 20110731 (Red Hat 4.4.6-4)
• Build system：Makefile
• zstd versions tested: 1.5.4 and 1.5.5
• Flags: default

Additional context
zstd 1.5.2 version can run normally

[Cyan4973]

I tested the proposed data sample (generated using the provided source code),
and on my local platform, simple_compression doesn't fail nor segfault :

 ./simple_compression test_data
                test_data :   8192 ->     125 - test_data.zst

edit :
I tested on a 2nd (completely different) platform,
observed the same result : simple_compression is successful, no segfault.