Consistent instanceof/casting of Class references

(cherry picked from commit ac80ac6)

spring-jdbc/src/main/java/org/springframework/jdbc/core/JdbcTemplate.java

@@ -1464,12 +1464,12 @@ public class JdbcTemplate extends JdbcAccessor implements JdbcOperations {
 				return System.identityHashCode(proxy);
 			}
 			else if (method.getName().equals("unwrap")) {
-				if (((Class) args[0]).isInstance(proxy)) {
+				if (((Class<?>) args[0]).isInstance(proxy)) {
 					return proxy;
 				}
 			}
 			else if (method.getName().equals("isWrapperFor")) {
-				if (((Class) args[0]).isInstance(proxy)) {
+				if (((Class<?>) args[0]).isInstance(proxy)) {
 					return true;
 				}
 			}