use length of signature read when trying to match input stream formats

git-svn-id: https://svn.apache.org/repos/asf/commons/sandbox/compress/trunk@741476 13f79535-47bb-0310-9956-ffa450edef68
6 files changed
tree: d0414fb437a498c512dcd2208a87fb7162812d08
  1. src/
  2. LICENSE.txt
  3. NOTICE.txt
  4. pom.xml