setting a default for non-existent property

[John W. Eaton]

On  7-May-2009, Ben Abbott wrote:

| octave:5> plot(1:10)
| error: set: unknown property "horizontalalignment"
| error: set: unknown property "horizontalalignment"
| error: set: unknown property "horizontalalignment"
| error: set: unknown property "horizontalalignment"
| error: set: unknown property "verticalalignment"
| error: set: unknown property "verticalalignment"
| error: set: unknown property "verticalalignment"
| error: set: unknown property "rotation"
| error: error setting default property fontname
| error: __goaxes__: unable to create graphics handle
| error: called from:
| error:   /Users/bpabbott/Development/mercurial/local_clone/scripts/plot/axes.m at line 40, column 9
| error:   /Users/bpabbott/Development/mercurial/local_clone/scripts/plot/gca.m at line 45, column 9
| error:   /Users/bpabbott/Development/mercurial/local_clone/scripts/plot/__plt_get_axis_arg__.m at line 63, column 4
| error:   /Users/bpabbott/Development/mercurial/local_clone/scripts/plot/plot.m at line 178, column 18
| 
| I assume you're able to plot, so I'll take another shot at building.

No, this fails for me too.  I didn't actually try a plot as I assumed
my changes would only affect the "defaultOBJECTPROPERTY" feature.

jwe