use T instead of RuntimeException

src/core/lombok/Lombok.java

@@ -52,7 +52,7 @@ public class Lombok {
 	}
 	
 	@SuppressWarnings("unchecked")
-	private static <T extends Throwable> RuntimeException sneakyThrow0(Throwable t) throws T {
+	private static <T extends Throwable> T sneakyThrow0(Throwable t) throws T {
 		throw (T)t;
 	}