Check null of exception (#28)

Raul Hidalgo Caballero · SapphireBrand · web-flow · commit f51323672049 · 2018-02-22T19:39:38.000+01:00
Co-Authored-By: SapphireBrand &lt;sapphirebrand@users.noreply.github.com&gt;
diff --git a/src/GraphQL.Client/Exceptions/GraphQLHttpException.cs b/src/GraphQL.Client/Exceptions/GraphQLHttpException.cs
@@ -17,7 +17,7 @@ public class GraphQLHttpException : Exception {
 		/// Creates a new instance of <see cref="GraphQLHttpException"/>
 		/// </summary>
 		/// <param name="httpResponseMessage">The unexpected <see cref="System.Net.Http.HttpResponseMessage"/></param>
-		public GraphQLHttpException(HttpResponseMessage httpResponseMessage) : base($"Unexpected {nameof(System.Net.Http.HttpResponseMessage)} with code: {httpResponseMessage.StatusCode}") {
+		public GraphQLHttpException(HttpResponseMessage httpResponseMessage) : base($"Unexpected {nameof(System.Net.Http.HttpResponseMessage)} with code: {httpResponseMessage?.StatusCode}") {
 			this.HttpResponseMessage = httpResponseMessage ?? throw new ArgumentNullException(nameof(httpResponseMessage));
 		}
 

Original file line number	Diff line number	Diff line change
`@@ -17,7 +17,7 @@ public class GraphQLHttpException : Exception {`
`17`	`17`	`/// Creates a new instance of <see cref="GraphQLHttpException"/>`
`18`	`18`	`/// </summary>`
`19`	`19`	`/// <param name="httpResponseMessage">The unexpected <see cref="System.Net.Http.HttpResponseMessage"/></param>`
`20`		`- public GraphQLHttpException(HttpResponseMessage httpResponseMessage) : base($"Unexpected {nameof(System.Net.Http.HttpResponseMessage)} with code: {httpResponseMessage.StatusCode}") {`
	`20`	`+ public GraphQLHttpException(HttpResponseMessage httpResponseMessage) : base($"Unexpected {nameof(System.Net.Http.HttpResponseMessage)} with code: {httpResponseMessage?.StatusCode}") {`
`21`	`21`	`this.HttpResponseMessage = httpResponseMessage ?? throw new ArgumentNullException(nameof(httpResponseMessage));`
`22`	`22`	`}`
`23`	`23`