Revert "Commence a passer en mysqli"

This reverts commit faaf268d.

.travis.yml

 language: php
 php:
-  - 5.5
   - 5.4
   - 5.3
 script: phpunit --coverage-clover=coverage.clover

bureau/class/db_mysql.php

@@ -325,7 +325,7 @@ class DB_Sql {
                  $this->Seq_Table,
                  $seq_name,
                  $currentid);
-        @mysql_query($q, $this->Link_ID);
+        $id = @mysql_query($q, $this->Link_ID);
       } else {
         $currentid = $res["nextid"];
       }
@@ -334,7 +334,7 @@ class DB_Sql {
                $this->Seq_Table,
                $nextid,
                $seq_name);
-      @mysql_query($q, $this->Link_ID);
+      $id = @mysql_query($q, $this->Link_ID);
       $this->unlock();
     } else {
       $this->halt("cannot lock ".$this->Seq_Table." - has it been created?");
@@ -345,6 +345,8 @@ class DB_Sql {
 
   /* public: return table metadata */
   function metadata($table='',$full=false) {
+    $count = 0;
+    $id    = 0;
     $res   = array();
 
     /*
@@ -479,7 +481,7 @@ class DB_Sql {
     $this->query("SHOW TABLES");
     $i=0;
     $return=array();
-    while ($info=mysqli_fetch_row($this->Query_ID))
+    while ($info=mysql_fetch_row($this->Query_ID))
      {
       $return[$i]["table_name"]= $info[0];
       $return[$i]["tablespace_name"]=$this->Database;