[gnumeric] MUNIT: return right error for size 0<n<1.

[Morten Welinder <mortenw src gnome org>]

commit b0fd77ca2b87719881e348cd0ab0ba51d1e74a18
Author: Morten Welinder <terra gnome org>
Date:   Mon Feb 26 10:59:04 2018 -0500

    MUNIT: return right error for size 0<n<1.

 NEWS                        |    1 +
 plugins/fn-math/ChangeLog   |    5 +++++
 plugins/fn-math/functions.c |    2 +-
 3 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index ff76d1a..09c6ab1 100644
--- a/NEWS
+++ b/NEWS
@@ -6,6 +6,7 @@ Morten:
        * Some internal array formula code cleanups.
        * Fix problem with stopping a glpk solver.
        * Improve workaround for gtk+ scrollbar bug.  [#792417]
+       * Fix minor issue for MUNIT.
 
 Rafael Fontenelle:
         * Doc fixes.  [#792556] [#792592]
diff --git a/plugins/fn-math/ChangeLog b/plugins/fn-math/ChangeLog
index 73a68a6..9d6371e 100644
--- a/plugins/fn-math/ChangeLog
+++ b/plugins/fn-math/ChangeLog
@@ -1,3 +1,8 @@
+2018-02-26  Morten Welinder  <terra gnome org>
+
+       * functions.c (gnumeric_munit): Return the right error if we get a
+       size between 0 and 1.
+
 2017-12-28  Morten Welinder <terra gnome org>
 
        * Release 1.12.38
diff --git a/plugins/fn-math/functions.c b/plugins/fn-math/functions.c
index 0e295c1..5c2cde3 100644
--- a/plugins/fn-math/functions.c
+++ b/plugins/fn-math/functions.c
@@ -2996,7 +2996,7 @@ gnumeric_munit (GnmFuncEvalInfo *ei, GnmValue const * const *argv)
        gint c, ni;
        GnmValue *res;
 
-       if (n <= 0)
+       if (n < 1)
                return value_new_error_NUM (ei->pos);
 
        /*