[fpc-pascal] Using other fpc installation

[Marco van de Voort]

In our previous episode, kapibara via fpc-pascal said:
> 
> I want to use the fp editor to run the test, but it seems as the 
> "systemic" 2.6.4 is being used for compiling instead of the SVN version. 

Then you use a 2.6.4 FP.  FP does not call the compiler, it has an own
version of it internally.