[genius] Tue Apr 18 12:44:38 2017 Jiri (George) Lebl <jirka 5z com>

[George Lebl <jirka src gnome org>]

commit 1e009c73a8bfe0d5e891abd6e1ca2cac81796873
Author: Jiri (George) Lebl <jiri lebl gmail com>
Date:   Tue Apr 18 12:44:40 2017 -0500

    Tue Apr 18 12:44:38 2017  Jiri (George) Lebl <jirka 5z com>
    
        * src/graphing.c: fix error checking on SurfacePlotDataGrid, thanks
          to David Binderman

 ChangeLog      |    9 +++++++--
 src/graphing.c |    2 +-
 2 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index a6dde3c..54ddf74 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,11 @@
+Tue Apr 18 12:44:38 2017  Jiri (George) Lebl <jirka 5z com>
+
+       * src/graphing.c: fix error checking on SurfacePlotDataGrid, thanks
+         to David Binderman
+
 Tue Apr 18 12:36:00 2017  Jiri (George) Lebl <jirka 5z com>
 
-       * examples/vibrating-drum-modes.gel: optionally draw node lines.
+       * examples/vibrating-drumhead-modes.gel: optionally draw node lines.
 
 Mon Apr 17 13:17:45 2017  Jiri (George) Lebl <jirka 5z com>
 
@@ -15,7 +20,7 @@ Fri Mar 10 13:15:25 2017  Jiri (George) Lebl <jirka 5z com>
 Wed Feb 15 13:13:40 2017  Jiri (George) Lebl <jirka 5z com>
 
        * examples/fourier-series-*.gel: Run 10 instead of 3 iterations of
-         the animation for the Gibbs, also fix english typo in a comment
+         the animation for the Gibbs, also fix English typo in a comment
          in the plotting example.
 
 Tue Dec 27 15:42:39 2016  Jiri (George) Lebl <jirka 5z com>
diff --git a/src/graphing.c b/src/graphing.c
index ff79551..28752b0 100644
--- a/src/graphing.c
+++ b/src/graphing.c
@@ -10183,7 +10183,7 @@ SurfacePlotDataGrid_op (GelCtx *ctx, GelETree * * a, int *exception)
        }
 
        if (a[1]->type != GEL_MATRIX_NODE &&
-           (gel_matrixw_elements (a[1]->mat.matrix) != 6 ||
+           (gel_matrixw_elements (a[1]->mat.matrix) != 6 &&
             gel_matrixw_elements (a[1]->mat.matrix) != 4)) {
                gel_errorout (_("%s: second argument not a 4 or 6 element vector of limits"), 
"SurfacePlotDataGrid");
                return NULL;