throw exception on mysql error

Signed-off-by: Derek Smart <derek@grindaga.com>

Author: mcred

src/PHPRed.php

@@ -13,6 +13,9 @@ public function __construct(\mysqli $mysqli)
     protected function query(string $query) : array
     {
         $results = $this->mysqli->query($query);
+        if ($this->mysqli->errno) {
+            throw new \Exception($this->mysqli->error);
+        }
         if ($results->num_rows == 0) {
             throw new \Exception("No records found.");
         }