Close open file handles in files library

ref #10392

lib/private/files/storage/common.php

@@ -226,6 +226,7 @@ abstract class Common implements \OC\Files\Storage\Storage {
 		$tmpFile = \OC_Helper::tmpFile($extension);
 		$target = fopen($tmpFile, 'w');
 		\OC_Helper::streamCopy($source, $target);
+		fclose($target);
 		return $tmpFile;
 	}
 

lib/private/files/storage/dav.php

@@ -295,6 +295,7 @@ class DAV extends \OC\Files\Storage\Common {
 			\OCP\Util::writeLog("webdav client", 'curl GET ' . curl_getinfo($curl, CURLINFO_EFFECTIVE_URL) . ' returned status code ' . $statusCode, \OCP\Util::ERROR);
 		}
 		curl_close($curl);
+		fclose($source);
 		$this->removeCachedFile($target);
 	}
 

lib/private/files/view.php

@@ -670,6 +670,7 @@ class View {
 			$source = fopen($tmpFile, 'r');
 			if ($source) {
 				$this->file_put_contents($path, $source);
+				fclose($source);
 				unlink($tmpFile);
 				return true;
 			} else {