Caldav: fix private events filter condition

git-svn-id: http://svn.code.sf.net/p/davmail/code/trunk@996 3d1905a2-6b24-0410-a738-b14d5a86fcbd

src/java/davmail/exchange/ExchangeSession.java

@@ -2601,7 +2601,7 @@ public class ExchangeSession {
         }
 
         String privateCondition = "";
-        if (!isSharedFolder(folderPath)) {
+        if (isSharedFolder(folderPath)) {
             LOGGER.debug("Shared or public calendar: exclude private events");
             privateCondition = "                AND \"http://schemas.microsoft.com/exchange/sensitivity\" = 0\n";
         }