ModuleController: Fix typo in global var name
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@ -152,7 +152,7 @@ class ModuleController extends DocController
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$lastModified = gmdate('D, d M Y H:i:s T', $imageInfo->getMTime());
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$match = false;
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if (isset($_SERER['HTTP_IF_NONE_MATCH'])) {
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if (isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
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$ifNoneMatch = explode(', ', stripslashes($_SERVER['HTTP_IF_NONE_MATCH']));
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foreach ($ifNoneMatch as $tag) {
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if ($tag === $etag) {
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