Cherry-pick 9ebaa6b. rdar://118902468

    [Media] Don't try to loop if current time or duration is zero
    https://bugs.webkit.org/show_bug.cgi?id=265485
    rdar://118902468

    Reviewed by Jer Noble.

    Don't loop if current time or duration is zero.

    * Source/WebCore/html/HTMLMediaElement.cpp:
    (WebCore::HTMLMediaElement::mediaPlayerTimeChanged):

    Canonical link: https://commits.webkit.org/271256@main

Identifier: 267815.622@safari-7617-branch

Source/WebCore/html/HTMLMediaElement.cpp

@@ -5419,7 +5419,7 @@ void HTMLMediaElement::mediaPlayerTimeChanged()
             m_sentEndEvent = false;
             // then seek to the earliest possible position of the media resource and abort these steps when the direction of
             // playback is forwards,
-            if (now >= dur) {
+            if (now >= dur && (now + dur) > MediaTime::zeroTime()) {
                 ALWAYS_LOG(LOGIDENTIFIER, "current time (", now, ") is greater then duration (", dur, "), looping");
                 seekInternal(MediaTime::zeroTime());
             }