JBR-4774 macOS: SIGILL at [libsystem_kernel] __kill in NPE / VolatileSurfaceManager.displayChanged / __displaycb_handle_block_invoke

Added null check

src/java.desktop/share/classes/sun/awt/image/VolatileSurfaceManager.java

@@ -359,7 +359,9 @@ public abstract class VolatileSurfaceManager
             // Note that getBackupSurface may set sdAccel to null so we have to invalidate it before
             SurfaceData oldData = sdAccel;
             sdAccel = null;
-            oldData.invalidate();
+            if (oldData != null) {
+                oldData.invalidate();
+            }
         }
         // Update graphicsConfig for the vImg in case it changed due to
         // this display change event