fix #58; ValueError raised when reading 'cm_servers.json'

steam/client/__init__.py

@@ -101,13 +101,15 @@ class SteamClient(CMClient, BuiltinBase):
         if not os.path.isfile(filepath): return
 
         self._LOG.debug("Reading CM servers from %s" % repr(filepath))
+
         try:
             with open(filepath, 'r') as f:
                 data = json.load(f)
+        except ValueError:
+            self._LOG.error("Failed parsing %s", repr(filepath))
         except IOError as e:
-            self._LOG.error("load %s: %s" % (repr(filepath), str(e)))
+            self._LOG.error("Failed reading %s (%s)", repr(filepath), str(e))
-            return
+        else:
-
             self.cm_servers.clear()
             self.cm_servers.merge_list(data['servers'])
             self._cm_servers_timestamp = int(data['timestamp'])