deal with apparent lack of FontDescriptor for standard fonts

pdf.js

@@ -2343,7 +2343,12 @@ var CanvasGraphics = (function() {
 
     constructor.prototype = {
         translateFont: function(fontDict, xref, resources) {
-            var descriptor = xref.fetch(fontDict.get("FontDescriptor"));
+            var fd = fontDict.get("FontDescriptor");
+            if (!fd)
+                // XXX deprecated "special treatment" for standard
+                // fonts?  What do we need to do here?
+                return;
+            var descriptor = xref.fetch(fd);
 
             var fontName = descriptor.get("FontName");
             assertWellFormed(IsName(fontName), "invalid font name");

test.py

@@ -287,9 +287,10 @@ def processResults():
 
 def main(args):
     masterMode = False
+    manifestFile = DEFAULT_MANIFEST_FILE
     if len(args) == 1:
         masterMode = (args[0] == '-m')
-        manifestFile = args[0] if not masterMode else DEFAULT_MANIFEST_FILE
+        manifestFile = args[0] if not masterMode else manifestFile
 
     setUp(manifestFile, masterMode)