compilation with IntelMPI failed

Using ThirdParty compiler Gcc64 and pointing to MPI_ROOT path to intelMPI
complain about mpi.h not found during compilation of src/Pstream and src/parallel/decompose/ptscotchDecomp

"sinclude $(GENERAL_RULES)/mplib$(WM_MPLIB)"
"sinclude $(RULES)/mplib$(WM_MPLIB)"

Solution: Mark pointed out following need to be added to fix this issue
"sinclude $(DEFAULT_RULES)/mplib$(WM_MPLIB)"