minor comment, and catching undefined reject in monero_utils

monero_utils/MyMoneroCoreBridge.js

@@ -712,10 +712,11 @@ module.exports = function(options)
 				};
 			} else if (ENVIRONMENT_IS_WEB||ENVIRONMENT_IS_WORKER) {
 				read_fn = function(url)
-				{
-					var xhr = new XMLHttpRequest;
-					xhr.open("GET", url, false);
-					xhr.send(null);
+				{ // it's an option to move this over to fetch, but, fetch requires a polyfill for these older browsers anyway - making fetch an automatic dep just for asmjs fallback - probably not worth it yet - but it would be if fetch were to become a dep for another reason, such as a networked SendFunds() implementation
+					var xhr = new XMLHttpRequest()
+					xhr.open("GET", url, false)
+					xhr.send(null)
+					//
 					return xhr.responseText
 				};
 			} else {

monero_utils/monero_utils.js

@@ -123,7 +123,11 @@ const moneroUtils_promise = new Promise(function(resolve, reject)
 		{
 			console.error("Error: ", e);
 			// this may be insufficient… being able to throw would be nice
-			reject(e);
+			if (reject) {
+				reject(e)
+			} else {
+				throw "Promise passed no reject function to monero_utils load fn"
+			}
 		});
 		coreBridgeLoading_promise.then(_didLoad);
 	}