Fix MSVC 7.1 IDE path (for MSVS detection code) in Tool/MSCommon/vs.py.
Fix MSVC 7.1 IDE path (for MSVS detection code) in Tool/MSCommon/vs.py.

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