prevent crash if ccurl is not supported

app/js/ccurl-interface.js

@@ -69,8 +69,10 @@ var ccurlInterruptAndFinalize = function(libccurl) {
 }
 
 var ccurlHashing = function(libccurl, trunkTransaction, branchTransaction, minWeightMagnitude, trytes, callback) {
-  if (!libccurl.hasOwnProperty("ccurl_pow")) {
-    return callback(new Error("Hashing not available"));
+  var ccurlPoW = connection.ccurl
+
+  if (!libccurl || !libccurl.hasOwnProperty("ccurl_pow")) {
+    ccurlPoW = 0
   }
 
   var iotaObj = iota;
@@ -165,7 +167,7 @@ var ccurlHashing = function(libccurl, trunkTransaction, branchTransaction, minWe
 
     var newTrytes = iotaObj.utils.transactionTrytes(txObject);
 
-    switch (connection.ccurl) {
+    switch (ccurlPoW) {
       case 0: {
         libcurl.pow({trytes: newTrytes, minWeight: minWeightMagnitude}).then(function(nonce) {
           var returnedTrytes = newTrytes.substr(0, 2673-81).concat(nonce);

ui/js/ui.init.js

@@ -122,12 +122,15 @@ var UI = (function(UI, $, undefined) {
             console.log("...");
           }
           showLightWalletErrorMessage();
-          return;
+          connection.ccurlProvider = null
         } else {
-          connection.ccurlProvider = ccurl.ccurlProvider(connection.ccurlPath);
-          if (!connection.ccurlProvider) {
-            console.log("Did not get ccurlProvider from " + connection.ccurlPath);
-            return;
+          try {
+            connection.ccurlProvider = ccurl.ccurlProvider(connection.ccurlPath);
+            if (!connection.ccurlProvider) {
+              console.log("Did not get ccurlProvider from " + connection.ccurlPath);
+            }
+          } catch (err) {
+            connection.ccurlProvider = null
           }
         }
         // Overwrite iota lib with light wallet functionality