sis7018: Fix PVS 1617

Use new(std::nothrow) so that NULL check for allocated memory makes sense.

Change-Id: Iab5efa869b83f5a312a1eaf8851a9e99888ff075
Reviewed-on: https://review.haiku-os.org/691
Reviewed-by: Adrien Destugues <[email protected]>

src/add-ons/kernel/drivers/audio/ac97/sis7018/Driver.cpp

@@ -79,7 +79,7 @@ init_driver()
 					break;
 				}
 
-				Device* device = new Device(cardInfos[idx], info);
+				Device* device = new(std::nothrow) Device(cardInfos[idx], info);
 				if (device == 0) {
 					return ENODEV;
 				}