CLDSRV-909: Use plain if for sourceServerAccessLog error assignment

Author: tcarmet

lib/api/objectCopy.js

@@ -357,8 +357,10 @@ function objectCopy(authInfo, request, sourceBucket,
                         const err = errorInstances.InvalidRequest.customizeDescription(
                             'The specified copy source is larger than the maximum ' +
                             `allowable size for a copy source: ${constants.maximumAllowedUploadSize}`);
-                        // eslint-disable-next-line no-param-reassign
-                        request.sourceServerAccessLog && (request.sourceServerAccessLog.error = err);
+                        if (request.sourceServerAccessLog) {
+                            // eslint-disable-next-line no-param-reassign
+                            request.sourceServerAccessLog.error = err;
+                        }
                         return next(err, destBucketMD);
                     }
                     const headerValResult =