include a preceeding data point so that lines that are off the

graph draw more nicely..

root/js/solardash.file.jspp

@@ -35,8 +35,10 @@ WebSocketTest.prototype.send = function (s) {
 			msg[2] = Infinity;
 		var loidx, hiidx;
 		loidx = fakedata.production.bisect([msg[1], 0]);
-		hiidx = fakedata.production.bisect([msg[2], 0]);
-		var subar = fakedata.production.slice(loidx, hiidx + 1);
+		if (loidx > 0)
+			loidx -= 1;
+		hiidx = fakedata.production.bisect([msg[2], 0]) + 1;
+		var subar = fakedata.production.slice(loidx, hiidx);
 		var data = {
 			"production": subar,
 			"consumption": subar,