Fix validation of array properties to set(), avoid segfaults (bug #bug #35687). * libinterp/corefcn/graphics.cc(array_property::validate): Don't accept an empty matrix by default. Instead, check an empty matrix against any size constraints to verify it is allowed. * libinterp/corefcn/graphics.in.h: Update init() routines for all graphic objects to include size constraints on any array_properties. Also matched type constraints, such as "double" or "uint8", to Matlab.

gnulib-hg = gnulib-hg