decodebin3: Be more specific when sending missing plugin messages
In addition to the missing plugin message (that was sent just above), we should also send an ERROR or WARNING message (depending on the gravity of the situation).
Fixes #3360 (closed)
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In addition to the missing plugin message (that was sent just above), we should also send an ERROR or WARNING message (depending on the gravity of the situation).
Fixes #3360 (closed)