Error in check for valid environment variable in `TPJEnvironmentVars.CreateBlock`

[delphidabbler]

envvars/PJEnvVars.pas

Line 401 in afdae11

if AnsiPos('=', NewEnv[Idx]) = 0 then

This check considers =Value as a valid environment variable, but it isn't.

Change to use TPJEnvironmentVar.IsValidStr instead.