the initial file wasn't really compressed as the snappy compressor detected it couldn't compress the GIF any further - force compression

git-svn-id: https://svn.apache.org/repos/asf/ant/antlibs/compress/trunk@1553665 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/tests/resources/asf-logo.gif.sz b/src/tests/resources/asf-logo.gif.sz
index 341d458..52f65da 100644
--- a/src/tests/resources/asf-logo.gif.sz
+++ b/src/tests/resources/asf-logo.gif.sz
Binary files differ