OSV-2026-338 Use-of-uninitialized-value in pjsip_auth_clt_init_req

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=488721002 Crash type: Use-of-uninitialized-value Crash state: pjsipauthcltinitreq fuzz-sip.c fuzz-sip.c...