Fixed fatal typo that broke getComponentString when working with two-point geometries. Added tests to check that everything works as expected now. r=pagameba (pullup #1730)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@8016 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Renderer/SVG.js

@@ -661,7 +661,7 @@ OpenLayers.Renderer.SVG = OpenLayers.Class(OpenLayers.Renderer.Elements, {
                 // If so, add the coordinate of the intersection with the
                 // valid range bounds.
                 if (i > 0) {
-                    if (this.getShortString(components[i + 1])) {
+                    if (this.getShortString(components[i - 1])) {
                         strings.push(this.clipLine(components[i],
                             components[i-1]));
                     }