Bug 95974 [Preferences] Line Delimiter preference page causes full build without user change
N20050519-0010 Line Delimiter preference page causes full build without user change - new workspace, import plugin org.junit as source - Go to Window > Preferences > General > Editors - without changing anything in the dialog, press OK => A "Setting Encoding" job is started, followed by a full build. Should not build when the user did not change anything.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/dialogs/ResourceEncodingFieldEditor.java
* @return the charset from the content description, or <code>null</code>
	 */
	private String getCharsetFromDescription() {
		IContentDescription description = getContentDescription();
		if (description != null)
			return description.getCharset();
		return null;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.ide.dialogs.AbstractEncodingFieldEditor#defaultButtonText()
	 */
	protected String defaultButtonText() {
		if (resource instanceof IWorkspaceRoot)
			return super.defaultButtonText();
		if (resource instanceof IFile) {
			try {
				IContentDescription description = ((IFile) resource).getContentDescription();
				
				if (description == null || description.getCharset() == null)
					return NLS.bind(IDEWorkbenchMessages.ResourceInfo_fileContainerEncodingFormat, getDefaultEnc());
				return NLS.bind(IDEWorkbenchMessages.ResourceInfo_fileContentEncodingFormat, getDefaultEnc());
			} catch (CoreException exception) {
				
			}
		}
		return NLS.bind(IDEWorkbenchMessages.ResourceInfo_containerEncodingFormat, getDefaultEnc());
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.ide.dialogs.AbstractEncodingFieldEditor#createEncodingGroup(org.eclipse.swt.widgets.Composite, int)
	 */