Fix SF #544995 (zlib crash on second flush call)
Bug fix by mhammond.
Bug fix candidate for 2.2, not present in 2.1.
diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py
index 8881516..35bca88 100644
--- a/Lib/test/test_zlib.py
+++ b/Lib/test/test_zlib.py
@@ -41,6 +41,12 @@
co = zlib.compressobj(8, 8, -15)
x1 = co.compress(buf)
x2 = co.flush()
+try:
+ co.flush()
+ print "Oops - second flush worked when it should not have!"
+except zlib.error:
+ pass
+
x = x1 + x2
dc = zlib.decompressobj(-15)