correct collage exception

commands/collage.py

@@ -19,9 +19,10 @@ async def send_collage(bot: bot.Bot, ctx: nerimity.Context, entity: str, size: s
         if int(size.split('x')[0]) > 5 or int(size.split('x')[1]) > 5:
             await ctx.send(u.error_msg("Maximum size allowed is 5x5."))
             return
-            
-    except ValueError:
+
+    except Exception:
         await ctx.send(u.error_msg(f"Please provide a valid size.\nie `/chart{entity} 5x5`"))
+        return
     
     if not username:
         try: username = await bot.get_lastfm(ctx.author.id)