Fix status code check according to recent changes in OSRM. Close #184

Author: perliedman

src/L.Routing.OSRM.js

@@ -94,7 +94,7 @@
 			    i;
 
 			context = context || callback;
-			if (response.status !== 0) {
+			if (response.status !== 0 && response.status !== 200) {
 				callback.call(context, {
 					status: response.status,
 					message: response.status_message