[gcalctool] Fix incorrect error text for acosh function (Bug #632614)

[Robert Ancell <rancell src gnome org>]

commit c77eee9077ff7e2993da533a454e138cdb6f5ba3
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Oct 21 11:07:05 2010 +1100

    Fix incorrect error text for acosh function (Bug #632614)

 NEWS                   |    1 +
 src/mp-trigonometric.c |    2 +-
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index dae040d..74bd5a6 100644
--- a/NEWS
+++ b/NEWS
@@ -6,6 +6,7 @@ Overview of changes in gcalctool 5.91.2
       oversized in some languages
     * Handle Han digits (ã??ã?¡ã?¢ã?£ã?¤ã?¥ã?¦ã?§ã?¨ã?©)
     * If a thousands separator is not defined then use ' ' (Bug #632182)
+    * Fix incorrect error text for acosh function (Bug #632614)
 
 Overview of changes in gcalctool 5.91.1
 
diff --git a/src/mp-trigonometric.c b/src/mp-trigonometric.c
index 2ebc676..1de0548 100644
--- a/src/mp-trigonometric.c
+++ b/src/mp-trigonometric.c
@@ -588,7 +588,7 @@ mp_acosh(const MPNumber *x, MPNumber *z)
     mp_set_from_integer(1, &t);
     if (mp_is_less_than(x, &t)) {
         /* Translators: Error displayed when inverse hyperbolic cosine value is undefined */
-        mperr(_("Inverse hyperbolic cosine is undefined for values less than or equal to one"));
+        mperr(_("Inverse hyperbolic cosine is undefined for values less than one"));
         mp_set_from_integer(0, z);
         return;
     }