Merge branch 'fix/glfwcreatewindow-failure' of https://github.com/gouletr/emscripten into incoming

Conflicts:
	AUTHORS

AUTHORS

@@ -204,4 +204,5 @@ a license to everyone to use it as detailed in LICENSE.)
 * Kagami Hiiragi <kagami@genshiken.org>
 * Jan Bölsche <jan@lagomorph.de>
 * Sebastian Matthes <sebastianmatthes@outlook.com> (copyright owned by Volkswagen AG)
+* Robert Goulet <robert.goulet@autodesk.com> (copyright owned by Autodesk, Inc.)
 

src/library_glfw.js

@@ -627,6 +627,9 @@ var LibraryGLFW = {
         Module.ctx = Browser.createContext(Module['canvas'], true, true, contextAttributes);
       }
 
+      // If context creation failed, do not return a valid window
+      if (!Module.ctx) return 0;
+
       // Get non alive id
       var win = new GLFW.Window(id, width, height, title, monitor, share);