[gcalctool] Fix incorrect values for undefined tangent error message

[Robert Ancell <rancell src gnome org>]

commit 901dcdacf5087eab86c244a3baff49e30beced26
Author: Robert Ancell <robert ancell gmail com>
Date:   Thu Feb 18 15:31:24 2010 +1100

    Fix incorrect values for undefined tangent error message

 src/mp-trigonometric.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/mp-trigonometric.c b/src/mp-trigonometric.c
index f8b973c..53b8007 100644
--- a/src/mp-trigonometric.c
+++ b/src/mp-trigonometric.c
@@ -275,7 +275,7 @@ mp_tan(const MPNumber *x, MPAngleUnit unit, MPNumber *z)
     mp_cos(x, unit, &cos_x);
     if (mp_is_zero(&cos_x)) {
         /* Translators: Error displayed when tangent value is undefined */
-        mperr(_("Tangent is undefined for angles that are multiples of Ï?â??2 (180°) from Ï?â??4 (90°)"));
+        mperr(_("Tangent is undefined for angles that are multiples of Ï? (180°) from Ï?â??2 (90°)"));
         mp_set_from_integer(0, z);
         return;
     }