fix the resolution restriction applying for sidebar

files/routes/art_submissions.py

@@ -63,10 +63,11 @@ def submit_art_post(v):
 	file.save(highquality)
 	process_image(highquality, v) #to ensure not malware
 
-	with Image.open(highquality) as i:
-		if i.width != 2000 or i.height != 200:
-			os.remove(highquality)
-			abort(400, "Banners must be 2000x200")
+	if kind == "banner":
+		with Image.open(highquality) as i:
+			if i.width != 2000 or i.height != 200:
+				os.remove(highquality)
+				abort(400, "Banners must be 2000x200")
 
 	path = f"files/assets/images/{SITE_NAME}/{entry.location_kind}"
 	if not entry.hashes: