MemcacheStore: Fix bug with redudancy.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@79 44740490-163a-0410-bde0-09ae8108e29a

lib/SimpleSAML/MemcacheStore.php

@@ -145,7 +145,7 @@ class SimpleSAML_MemcacheStore {
 		 * we need to update this object, then we don't store the
 		 * serialized value.
 		 */
-		if($mustUpdate === TRUE) {
+		if($mustUpdate === FALSE) {
 			$latest->savedData = $latestSerializedValue;
 		}