Merge pull request #172 from sjaeckel/develop

fixed the installer in msysgit environment to work with windows XP
diff --git a/contrib/msysgit-install.cmd b/contrib/msysgit-install.cmd
index 1285839..5f005bf 100644
--- a/contrib/msysgit-install.cmd
+++ b/contrib/msysgit-install.cmd
@@ -22,11 +22,11 @@
 

 if not exist "%GIT_HOME%\bin\git-flow" goto :Install

 echo GitFlow is already installed.>&2

-choice /C YN /M "Do you want to replace it"

-if errorlevel 255 goto :Abort

-if errorlevel 2 goto :Abort

-if not errorlevel 1 goto :Abort

+set /p mychoice="Do you want to replace it [y/n]"

+if "%mychoice%"=="y" goto :DeleteOldFiles

+goto :Abort

 

+:DeleteOldFiles

 echo Deleting old files...

 for /F %%i in ("%GIT_HOME%\git-flow*" "%GIT_HOME%\gitflow-*") do if exist "%%~fi" del /F /Q "%%~fi"