Fixed #10196: Restored setting of image file width and height fields lost in r9766, and added tests for this function.  Thanks to vicvicvic for the ticket and patch and for Alex for reminding me not to break non-PIL-boxes with the new tests.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@9841 bcc190cf-cafb-0310-a4f2-bffc1f526a37