Minor fixes to quiet valgrind warnings


git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1438959 13f79535-47bb-0310-9956-ffa450edef68
Don't corrupt the bucket allocator in out-of-mem situation


git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1438960 13f79535-47bb-0310-9956-ffa450edef68