Missing instruction to change cabal config file in Windows install procedure

[haskie-lambda]

when installing the the platform on windows it would help to add an additional step to the install procedure described here:
Haskell Platform Windows installation

The missing step is to change the following in the %APPDATA%\Roaming\cabal\config file:
one has to change the colon in

extra-prog-path: C:\Program Files\Haskell Platform\8.4.3\msys\usr\bin,
C:\Users[user]\AppData\Roaming\cabal\bindir

to a semicolon

extra-prog-path: C:\Program Files\Haskell Platform\8.4.3\msys\usr\bin;
                 C:\Users\[user]\AppData\Roaming\cabal\bindir

otherwise some libraries can't be installed with cabbal (eg. old-time, hsdev, etc.)