[Octave-bug-tracker] [bug #51645] zoom to singular region dumps core

[Dan Sebald]

Follow-up Comment #7, bug #51645 (project octave):

I suppose by moving the mouse and doing multiple clicking one is generating 0
x 0 boxes somehow that aren't visible because they are obscured by the mouse
cursor.

One option is to remove the warning message.  Then neither the 100 x 0 nor the
0 x 0 boxes would do anything, it would seem.

Yes, it is possible to move the check for zero width sooner at the
mouseRelease level.  But from a proper coding perspective, since the
axes::properties::zoom inputs aren't prevented from being zero width or height
in some obvious way, it should allow crashing the program.  Who knows when
::zoom might find some other application?

Could still have a check sooner, and maybe move that warning message to
Canvas::canvasMouseReleaseEvent() rather than the lower-level zoom routine.

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