message: [Makefile] minor fix
diff: @@ -37,9 +37,11 @@ endif
  #MPI_HOME = $(patsubst %/bin/mpicc,%,$(shell which mpicc | head -1))
  #endif
  +ifeq ($(strip $(USE_GASNET)),1)
  ifndef GASNET
  $(error GASNET variable is not defined, aborting build)
  endif
  +endif
  GEN_SRC += ${FF_HOME}/src/runtime/model.cc\
  ${FF_HOME}/src/mapper/mapper.cc\
  