Fix the typos that can generate extra errors

components/signup.php

@@ -325,7 +325,7 @@ if(isset($_REQUEST['signupid'])&&isset($_REQUEST['signuppw'])){
 				    escapeshellarg($row[type]).
 				    ' 2>&1',
 				    $execoutputarr,
-				    $ececreturn
+				    $execreturn
 			    );
 			    if($execreturn!=0){
                                 $execoutputstr=implode("\n",$execoutputarr);
@@ -333,7 +333,7 @@ if(isset($_REQUEST['signupid'])&&isset($_REQUEST['signuppw'])){
                                 mail(
                                     $error_email,
                                     "Error adding user to mailing lists from signup id: ".$signupid,
-                                    $execoutputstr.$ececreturn,
+                                    $execoutputstr.$execreturn,
                                     "From: \"SUCS Admin\" <admin@sucs.org>"
                                 );
                                 $failed=true;