[twitter] Fix Read Error with exif_imagetype()
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@ -1183,7 +1183,14 @@ function twitter_expand_entities(App $a, $body, $item, $picture)
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$tempfile = tempnam(get_temppath(), "cache");
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file_put_contents($tempfile, $img_str);
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$mime = image_type_to_mime_type(exif_imagetype($tempfile));
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// See http://php.net/manual/en/function.exif-imagetype.php#79283
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if (filesize($tempfile) > 11) {
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$mime = image_type_to_mime_type(exif_imagetype($tempfile));
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} else {
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$mime = false;
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}
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unlink($tempfile);
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if (substr($mime, 0, 6) == "image/") {
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