[Plplot-cvs] CVS update notice (plplot/src)

[Alan W. I. <ai...@us...>]

Update of /cvsroot/plplot/plplot/src
In directory sc8-pr-cvs1:/tmp/cvs-serv30793

Modified Files:
	plshade.c 
Log Message:
Fixed subtle bug for the corner case when pltr == NULL AND contouring is
wanted.  In this case, plshades is supposed to have the same interpretation
as plshade, that is if pltr == NULL then transform the x and y index ranges
to the ranges xmin to xmax, and ymin to ymax.  Normally, that transformation
was accomplished by simply passing on pltr to plshade to deal with using the
correct transformation.  But a complication arose for pltr == NULL when
plshades was asked to also invoke plcont after its invocations of plshade.
The plcont interpretation of pltr is different, and in fact it must be
specified so the NULL was causing a segfault.  The solution for the case of
pltr == NULL and contouring is to generate the appropriate x and y grids
ranging from xmin to xmax and ymin to ymax on the fly and set up the
invocation of plcont from plshades appropriately.

I copied the ideas for the necessary memory management from other plplot code
and tested the result with valgrind to make sure no memory management issues
have been introduced by this bug fix.