rectint: fix for non-overlapping rectangle, and support ND boxes (bug #44904) * scripts/geometry/rectint.m: it was giving incorrect results (not zero) when the coordinates for X overlapped but the Y did not (added tests for this bug). This is a complete rewrite of the function. The new version performs approximately 1000 times faster and adds supports N dimensional boxes in which case it measures the volume or hypervolume of the hypervolume intersections. * NEWS: make note that rectint() now supports ND.

--- a/NEWS	Wed Apr 22 08:41:50 2015 -0700
+++ b/NEWS	Wed Apr 22 20:54:14 2015 +0100
@@ -179,7 +179,7 @@
 
  ** The following functions now support N-dimensional arrays:
 
-      fliplr   flipud   rot90
+      fliplr   flipud   rot90   rectint
 
  ** The new warning ID "Octave:data-file-in-path" replaces the three
     previous separate warning IDs "Octave:fopen-file-in-path",