Comment 10 for bug 776307

Tested on Pinta 1.1 on Windows XP sp3. Both of the problems solved:
1. New image width x height set to 0 x 0 is now set to 1 x 1.
2. If new image is pasted into existing canvas that is too small to handle the new image a question is raised if you would like to resize canvas. There is also a work-around for this problem - pasting in new image with <Ctrl>+<Alt>+V as described in #6.