flac: Fix padding for --replay-gain option.

Patches ported from the flac 1.2.1 maintenance branch.

    http://flac.cvs.sourceforge.net/viewvc/flac/flac/src/flac/encode.c?
    r1=1.194&r2=1.194.2.1&pathrev=FLAC_RELEASE_1_2_1_MAINTENANCE_BRANCH

    http://flac.cvs.sourceforge.net/viewvc/flac/flac/src/flac/main.c?
    r1=1.169&r2=1.169.2.1&pathrev=FLAC_RELEASE_1_2_1_MAINTENANCE_BRANCH

Patch-from: lvqcl <lvqcl.mail@gmail.com>
2 files changed