Fix for WOLFSSL_NO_REALLOC build crash

[lealem47]

Description

Fix for make check crash introduced in #8369

Testing

./configure --enable-all CFLAGS=-DWOLFSSL_NO_REALLOC && make check

Checklist

• added tests
• updated/added doxygen
• updated appropriate READMEs
• Updated manual and documentation

[lealem47]

Jenkins Retest this Please

Failure in scripts/openssl.test with ./configure --enable-sp-math-all --enable-sp CFLAGS="-DALT_ECC_SIZE" --enable-sp-asm --enable-opensslextra

New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : 0000
    Session-ID: 
    Session-ID-ctx: 
    Master-Key: 
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1737675320
    Timeout   : 7200 (sec)
    Verify return code: 0 (ok)
    Extended master secret: no
---
client failed! Suite = DHE-RSA-AES128-SHA256 version = 3
in cleanup
killing server: OpenSSL_RSA (61717)
killing server: wolfSSL_RSA (51923)
killing server: OpenSSL_ECDH[E]-ECDSA (62939)
killing server: wolfSSL_ECDH[E]-ECDSA (51923)
FAIL scripts/openssl.test (exit status: 1)