Bug 575983 - Stop disposing colors in swt

Handle snippets.

Change-Id: Ia201057d454be4cd6a1bc0280ac2da22a34b193b
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.swt/+/185562
Tested-by: Platform Bot <[email protected]>
Reviewed-by: Alexander Kurtakov <[email protected]>

Author: akurtakov

examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet141.java

@@ -93,7 +93,6 @@ public void run() {
 										}
 										offScreenImageGC.setBackground(bgColor != null ? bgColor : shellBackground);
 										offScreenImageGC.fillRectangle(imageData.x, imageData.y, imageData.width, imageData.height);
-										if (bgColor != null) bgColor.dispose();
 										break;
 									case SWT.DM_FILL_PREVIOUS:
 										/* Restore the previous image before drawing. */

examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet194.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2015 IBM Corporation and others.
+ * Copyright (c) 2000, 2021 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -66,10 +66,6 @@ public void run() {
 		} catch (SWTException ex) {
 			System.out.println("Error saving GIF: " + ex);
 		} finally {
-			white.dispose();
-			red.dispose();
-			green.dispose();
-			blue.dispose();
 			font.dispose();
 			display.dispose();
 		}