Don't try to fetch a gravatar after determining that its URL is invalid.
Don't try to fetch a gravatar after determining that its URL is invalid.

vishwesh3/zulip-android,saketkumar95/zulip-android,Sam1301/zulip-android,abhaymaniyar/zulip-android,prati0100/zulip-android,zulip/zulip-android,abhaymaniyar/zulip-android,saketkumar95/zulip-android,Sam1301/zulip-android,prati0100/zulip-android