merge r4005 from branch 2.0 to trunk

bug 1187: set_magic_quote_runtime and get_magic_quote_gpc are depreciated and can produce notices from PHP 5.3.
Add a @ to avoid this notices.
This functions need to be removed with PHP 6

git-svn-id: http://piwigo.org/svn/trunk@4006 68402e56-0260-453c-a942-63ccdbb3a9ee

admin/include/functions_upgrade.php

@@ -136,7 +136,7 @@ function check_upgrade_access_rights($current_release, $username, $password)
 {
   global $conf, $page;
 
-  if(!get_magic_quotes_gpc())
+  if(!@get_magic_quotes_gpc())
   {
     $username = mysql_real_escape_string($username);
   }

include/common.inc.php

@@ -34,7 +34,7 @@ $t2 = $t1[1].'.'.$t2[1];
 // addslashes to vars if magic_quotes_gpc is off this is a security
 // precaution to prevent someone trying to break out of a SQL statement.
 //
-if( !get_magic_quotes_gpc() )
+if( !@get_magic_quotes_gpc() )
 {
   function sanitize_mysql_kv(&$v, $k)
   {

install.php

@@ -77,7 +77,7 @@ function execute_sqlfile($filepath, $replaced, $replacing)
 // addslashes to vars if magic_quotes_gpc is off this is a security
 // precaution to prevent someone trying to break out of a SQL statement.
 //
-if( !get_magic_quotes_gpc() )
+if( !@get_magic_quotes_gpc() )
 {
   if( is_array($_POST) )
   {