Fixed issue minor warning when in debug mode that "$qidattributes['ot…

…her_numbers_only']" did not exist

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey_dev@7682 b72ed6b6-b9f8-46b5-92b4-906544132732

qanda.php

@@ -4008,7 +4008,7 @@ function do_shortfreetext($ia)
 	global $clang;
 	$qidattributes=getQuestionAttributes($ia[0]);
 
-    if ($qidattributes['other_numbers_only']==1)
+    if (isset($qidattributes['other_numbers_only']) && $qidattributes['other_numbers_only']==1)
     {
 		$numbersonly = 'onkeypress="return goodchars(event,\'0123456789.\')"';
 	}