changed create_table method to check whether a value returned from driver's forge is sql or bool (acts exactly as create_database)
diff --git a/system/database/DB_forge.php b/system/database/DB_forge.php
index 1aa2334..78bf77a 100644
--- a/system/database/DB_forge.php
+++ b/system/database/DB_forge.php
@@ -205,6 +205,12 @@
 		$sql = $this->_create_table($this->db->dbprefix.$table, $this->fields, $this->primary_keys, $this->keys, $if_not_exists);
 
 		$this->_reset();
+
+		if (is_bool($sql))
+		{
+			return $sql;
+		}
+
 		return $this->db->query($sql);
 	}