Fix ASAN warning with compatibility layer cipher list parsing

[dgarske]

Description

Fix for ASAN warning with compatibility layer cipher lists in ParseCipherList and CheckcipherList.

wolfssl/src/ssl.c:11892:16: runtime error: applying non-zero offset 1 to null pointer
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior wolfssl/src/ssl.c:11892:16 in

wolfssl/src/internal.c:26632:16: runtime error: applying non-zero offset 1 to null pointer
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior wolfssl/src/internal.c:26632:16 in

ZD 18175

Testing

./configure CC="clang -fsanitize=address" --enable-all && make check

Checklist

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

[dgarske]

Retest this please

[dgarske]

Retest this please