apr_pools: abort() if creating the pool mutex failed (APR_POOL_DEBUG mode). * memory/unix/apr_pools.c (apr_pool_create_ex_debug): Call abort_fn if any. (apr_pool_create_unmanaged_ex_debug): Call abort_fn if any. git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1927949 13f79535-47bb-0310-9956-ffa450edef68