MDrawParticles CoordinateList.l,NumPoints.l,Buffer.l ; Draw lots of previously grabbed points, using X.w,Y.w's

Performs a kind of `unbuffer' using a memory buffer (Buffer.l) of previously
created or grabbed pixels. The list, pointed to with CoordinateList.l, will be
read in reverse order, facilitating a stack rather than a queue system. This
allow this command to be used to correctly restore the pixels in the background
which were possibly trashed by other commands. It can also be used simply to
render a buffer of coloured pixels, perhaps representing an image, to locations
on the bitmap according to the X.w,Y.w coordinate list.  When MParticleMode is
set to MSimpleReMapMode or MReMapMode, points will be simple or complex remapped
respectively. In MSimpleReMapMode, the buffer points will be simple-remapped and
then simply placed in the destination. In MReMapMode, points will be
complex-remapped as a combination of buffer pixels and destination pixels.