identifiers in parents should now work better

Rev: lib/modules/Stdio.pmod:1.13
Rev: src/compilation.h:1.6
Rev: src/docode.c:1.26
Rev: src/fsort.c:1.4
Rev: src/global.h:1.14
Rev: src/las.c:1.47
Rev: src/object.c:1.35
Rev: src/object.h:1.15
Rev: src/pike_memory.c:1.7
Rev: src/program.c:1.59
Rev: src/program.h:1.29