// Fix PHP notice

git-svn-id: http://dev.prestashop.com/svn/v1/branches/1.5.x@17912 b9a71923-0436-4b27-9f14-aed3839534dd

classes/Currency.php

@@ -364,6 +364,9 @@ class CurrencyCore extends ObjectModel
 					}
 			}
 
+			if (!isset($rate))
+				$rate = 1;
+
 			$this->conversion_rate = round($rate / $conversion_rate, 6);
 		}
 		$this->update();