failed images can have with/height of None

oxdata/poster/models.py

@@ -29,6 +29,12 @@ def getPosters(movie_id, url_prefix='', limit=lambda x, y: 0.3 < x/y < 1):
         if p.site not in posters:
             posters[p.site] = []
         poster = p.get()
+        if poster and not poster.width or not poster.height:
+            p.failed = True
+            p.status = "invalid image"
+            p.image.delete()
+            p.save()
+            poster = None
         if poster:
             pjson = {}
             pjson['url'] = url_prefix + poster._get_url()
@@ -101,9 +107,14 @@ class PosterCache(models.Model):
                 self.failed = True
                 self.save()
         if self.image:
+            failed = False
             try:
                 self.image.width
+                if not self.image.width or not self.image.width:
+                    failed = True
             except:
+                failed = True
+            if failed:
                 self.failed = True
                 self.status = "invalid image"
                 self.image.delete()