Fix another use of uinitialized memory in ssl_parse_encrypted_pms
Fix another use of uinitialized memory in ssl_parse_encrypted_pms

Complement to 0a8352b4: peer_pmslen is not initialized when decryption
fails, so '|= peer_pmslen' may access uninitialized memory, as indicated
by Frama-C/Eva.

Co-authored-by: Gilles Peskine <f829db02715a0ea34b7c8e25097dae9e3517e831@arm.com>
Signed-off-by: André Maroneze <4e7c5e6411cada1ba567df66cff125eb40701625@users.noreply.github.com>

ARMmbed/mbedtls,NXPmicro/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,Mbed-TLS/mbedtls,NXPmicro/mbedtls,Mbed-TLS/mbedtls,NXPmicro/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,NXPmicro/mbedtls