From 6065697eb4b8f5014105f9beb7a2f9462368f2a8 Mon Sep 17 00:00:00 2001
From: Amit Aronovitch <amit@penguin>
Date: Sat, 3 Nov 2012 01:51:41 +0200
Subject: [PATCH] delaunay linear_interpolate_grid: enable grid of height/width
 1 fixes #997

---
 lib/matplotlib/delaunay/_delaunay.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/matplotlib/delaunay/_delaunay.cpp b/lib/matplotlib/delaunay/_delaunay.cpp
index 074ca139ca2c..395921b2e325 100644
--- a/lib/matplotlib/delaunay/_delaunay.cpp
+++ b/lib/matplotlib/delaunay/_delaunay.cpp
@@ -289,8 +289,8 @@ static PyObject *linear_interpolate_grid(double x0, double x1, int xsteps,
     if (!z) return NULL;
     z_ptr = (double*)PyArray_DATA(z);
 
-    dx = (x1 - x0) / (xsteps-1);
-    dy = (y1 - y0) / (ysteps-1);
+    dx = ( x1==x0 ? 0 : (x1 - x0) / (xsteps-1) );
+    dy = ( y1==y0 ? 0 : (y1 - y0) / (ysteps-1) );
 
     rowtri = 0;
     for (iy=0; iy<ysteps; iy++) {