Use int instead of char for the getchar() return value to allow for EOF.
Use int instead of char for the getchar() return value to allow for EOF.

Author: Eric Haszlakiewicz <19215929b4ea18bf0377a261f8977a86c9f403db@twosigma.com>

google/google-authenticator-libpam,google/google-authenticator-libpam,google/google-authenticator-libpam,google/google-authenticator-libpam