K 10 svn:author V 7 rwatson K 8 svn:date V 27 2004-02-03T02:50:51.000000Z K 7 svn:log V 287 Catch instances of (pipe == NULL) that were obsoleted with recent changes to jointly allocated pipe pairs. Replace these checks with pipe_present checks. This avoids a NULL pointer dereference when a pipe is half-closed. Submitted by: Peter Edwards END