[gnome-calculator] Changed overflow error message (bgo#745708)

[Robert Roth <robertroth src gnome org>]

commit 9131d38e1a37d1b7ff2b2e1fef29d04efed6e7d3
Author: Robert Roth <robert roth off gmail com>
Date:   Fri Jan 26 02:53:10 2018 +0200

    Changed overflow error message (bgo#745708)

 lib/serializer.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/lib/serializer.vala b/lib/serializer.vala
index b8282ae..e2bdbcc 100644
--- a/lib/serializer.vala
+++ b/lib/serializer.vala
@@ -329,7 +329,7 @@ public class Serializer : Object
             else
             {
                 string.prepend_c ('?');
-                error = _("Precision error");
+                error = _("Overflow: the result couldn't be calculated");
                 string.assign ("0");
                 break;
             }