Fixed issue #5418: Failing check on fieldnames POST variable

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey_ci@11212 b72ed6b6-b9f8-46b5-92b4-906544132732

application/libraries/Save.php

@@ -70,7 +70,7 @@ function run($args) {
 		    // Remove invalid fieldnames from fieldnames array
 		    for($x=count($postedfieldnames)-1;$x>=0;$x--)
 		    {
-		        if (strpos($postedfieldnames[$x],$surveyid.'X')===false)
+                if (!isset($_SESSION['fieldmap'][$postedfieldnames[$x]]))
 		        {
 		            array_remval($postedfieldnames[$x],$postedfieldnames);
 		        }