Python 1.5 compatibility:  explicity import SCons.compat (again) so the zip() function is available so the unit tests can pass when run on older Python versions.
Python 1.5 compatibility:  explicity import SCons.compat (again)
so the zip() function is available so the unit tests can pass when
run on older Python versions.

andrewyoung1991/scons,andrewyoung1991/scons,timj/scons,andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons,timj/scons,timj/scons,timj/scons,timj/scons,timj/scons,timj/scons,andrewyoung1991/scons,andrewyoung1991/scons,timj/scons,timj/scons