Fix #1714

why is RedirectStandardInput=true,UseShellExecute=false not the default

BizHawk.Common/OSTailoredCode.cs

@@ -127,6 +127,7 @@ namespace BizHawk.Common
 					CreateNoWindow = true,
 					FileName = cmd,
 					RedirectStandardError = checkStderr,
+					RedirectStandardInput = true,
 					RedirectStandardOutput = checkStdout,
 					UseShellExecute = false
 				}
@@ -149,4 +150,4 @@ namespace BizHawk.Common
 			}
 		}
 	}
-}
+}