Fixed bug reporting the significance of paired value t-test.

[pspp-builds.git] / src / data / casegrouper.c

diff --git a/src/data/casegrouper.c b/src/data/casegrouper.c
index 8a392afbab8be62531b68c9f3890818e88df4630..f5974a404b0a6200729548a62a2d67afde684323 100644 (file)
--- a/src/data/casegrouper.c
+++ b/src/data/casegrouper.c
@@ -1,20 +1,18 @@
-/* PSPP - computes sample statistics.
+/* PSPP - a program for statistical analysis.
    Copyright (C) 2007 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or
-   modify it under the terms of the GNU General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
 
-   This program is distributed in the hope that it will be useful, but
-   WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   General Public License for more details.
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA. */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
 #include <config.h>
 
@@ -112,9 +110,18 @@ casegrouper_get_next_group (struct casegrouper *grouper,
     {
       if (grouper->reader != NULL)
         {
-          *reader = grouper->reader;
-          grouper->reader = NULL;
-          return true;
+          if (!casereader_is_empty (grouper->reader))
+            {
+              *reader = grouper->reader;
+              grouper->reader = NULL;
+              return true;
+            }
+          else
+            {
+              casereader_destroy (grouper->reader);
+              grouper->reader = NULL;
+              return false;
+            }
         }
       else
         {