sm,g13: Init local vars to avoid compiler warnings.
* sm/misc.c (transform_sigval): Init RSA_S_LEN. * g13/mount.c (read_keyblob): Init HEADERLEN.
Not a bug but the compiler (gcc 4.9.1) can't detect that it is not
used uninitialized.
- Signed-off-by: Werner Koch <wk@gnupg.org>