Commit [r12302] Maximize Restore History

AWI commit of patch from Mark de Wever <>

to check plsc->label_func for NULL where appropriate. I also
added a one-line comment change.

Tested by: Alan W. Irwin <>. This was a
light test demonstrating the PLplot library and example 19 continued
to build without issues, and by demonstrating that running example 19
with the ps device under valgrind provided valgrind-clean results.

airwin 2013-03-29

changed /trunk/src/plbox.c
/trunk/src/plbox.c Diff Switch to side-by-side view