Fix SF # 532618 517704, install problems when building modules fail.

Fix whitespace on a line also.

setup.py

@@ -188,8 +188,13 @@ class PyBuildExt(build_ext):
                 # distutils.command.build_ext.build_extension().  The
                 # _built_objects attribute is stored there strictly for
                 # use here.
+                # If there is a failure, _built_objects may not be there,
+                # so catch the AttributeError and move on.
+                try:
                     for filename in self._built_objects:
                         os.remove(filename)
+                except AttributeError:
+                    self.announce('unable to remove files (ignored)')
             else:
                 self.announce('*** WARNING: importing extension "%s" '
                               'failed: %s' % (ext.name, why))