added dbprefix to dbforge functions
diff --git a/system/database/DB_forge.php b/system/database/DB_forge.php
index d4f1fae..f8b74c0 100644
--- a/system/database/DB_forge.php
+++ b/system/database/DB_forge.php
@@ -180,7 +180,7 @@
 			show_error('Field information is required.');

 		}

 

-		$sql = $this->_create_table($table, $this->fields, $this->primary_keys, $this->keys, $if_not_exists);

+		$sql = $this->_create_table($this->db->dbprefix.$table, $this->fields, $this->primary_keys, $this->keys, $if_not_exists);

 

 		$this->_reset();

 		return $this->db->query($sql);

@@ -197,7 +197,7 @@
 	 */

 	function drop_table($table_name)

 	{

-		$sql = $this->_drop_table($table_name);

+		$sql = $this->_drop_table($this->db->dbprefix.$table_name);

 		

 		if (is_bool($sql))

 		{

@@ -234,7 +234,7 @@
 			show_error('Field information is required.');

 		}

 

-		$sql = $this->_alter_table('ADD', $table, $this->fields, $after_field);

+		$sql = $this->_alter_table('ADD', $this->db->dbprefix.$table, $this->fields, $after_field);

 

 		$this->_reset();

 		return $this->db->query($sql);

@@ -263,7 +263,7 @@
 				show_error('A column name is required for that operation.');

 		}

 

-		$sql = $this->_alter_table('DROP', $table, $column_name);

+		$sql = $this->_alter_table('DROP', $this->db->dbprefix.$table, $column_name);

 	

 		return $this->db->query($sql);

 	}

@@ -296,7 +296,7 @@
 			show_error('Field information is required.');

 		}

 

-		$sql = $this->_alter_table('CHANGE', $table, $this->fields);

+		$sql = $this->_alter_table('CHANGE', $this->db->dbprefix.$table, $this->fields);

 

 		$this->_reset();

 		return $this->db->query($sql);