Merge branch '1.5.x'

spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/archive/JarFileArchive.java

@@ -149,7 +149,7 @@ public class JarFileArchive implements Archive {
 				ResourceAccess.ONCE);
 				OutputStream outputStream = new FileOutputStream(file)) {
 			byte[] buffer = new byte[BUFFER_SIZE];
-			int bytesRead = -1;
+			int bytesRead;
 			while ((bytesRead = inputStream.read(buffer)) != -1) {
 				outputStream.write(buffer, 0, bytesRead);
 			}