tpmclient: Initialize a few variables explicitly.
tpmclient: Initialize a few variables explicitly.

When compiling with -Wall -Werror these variables cause problems since
they're initialized conditionally and so they may not be set by the time
they're used (-Werror=maybe-uninitialized).

Signed-off-by: Philip Tricca <fd418754d31777cf39b16b99b0350486ab840079@intel.com>

tpm2-software/tpm2-tss,01org/tpm2-tss,01org/TPM2.0-TSS,01org/TPM2.0-TSS,01org/TPM2.0-TSS,01org/TPM2.0-TSS,tpm2-software/tpm2-tss,01org/tpm2-tss,tpm2-software/tpm2-tss,01org/tpm2-tss