Don't attempt to tokenize binary files for tracebacks.

Closes gh-1317

IPython/core/ultratb.py

@@ -824,6 +824,11 b' class VerboseTB(TBTools):'
                     # disabled.
                     call = tpl_call_fail % func
 
+            # Don't attempt to tokenize binary files.
+            if file.endswith(('.so', '.pyd', '.dll')):
+                frames.append('%s %s\n' % (link,call))
+                continue
+
             def linereader(file=file, lnum=[lnum], getline=linecache.getline):
                 if file.endswith(('.pyc','.pyo')):
                     file = pyfile.source_from_cache(file)