Description of problem:
@40079

If one enters the path to an image in the upload form instead of
browsing for it, the system gives no warning if the image does not
exist.  An 'image' with unknown width and length will be created.

The stack trace below is from the MultiPart article image upload. It's
a report of the IOException that occurs when the image is empty. Note
that this warning doesn't appear for, say, Article image uploading.
This means three things:

1) An exception is likely being hidden, or
2) The error is detected by this code, but not reported to the user
3) There's different sets of code doing the same thing


2004-02-04 12:27:48,820 [0][3]] ERROR cms.ImageAsset - IOException
guessing file size
java.io.EOFException
	at java.io.DataInputStream.readByte(DataInputStream.java:333)
	at
com.arsdigita.mimetypes.image.JPEGImageSizer.firstMarker(JPEGImageSizer.java:144)
	at
com.arsdigita.mimetypes.image.JPEGImageSizer.scanHeader(JPEGImageSizer.java:285)
	at
com.arsdigita.mimetypes.image.JPEGImageSizer.computeSize(JPEGImageSizer.java:90)
	at
com.arsdigita.mimetypes.image.ImageSizer.computeImageSize(ImageSizer.java:82)
	at com.arsdigita.cms.ImageAsset.guessSize(ImageAsset.java:215)
	at com.arsdigita.cms.ImageAsset.loadFromFile(ImageAsset.java:162)
	at
com.arsdigita.cms.contenttypes.ui.mparticle.ImageUploadSection.processImageUpload(ImageUploadSection.java:156)
	at
com.arsdigita.cms.contenttypes.ui.mparticle.SectionEditForm$SectionProcessListener.process(SectionEditForm.java:305)