Bug fix: only use guessed heap start if no heap start was found in the ELF file
Bug fix: only use guessed heap start if no heap start was found in the ELF file

contiki-os/mspsim,cmorty/mspsim,fvdnabee/mspsim,mspsim/mspsim,ransford/mspsim,contiki-os/mspsim,nfi/mspsim,cmorty/mspsim,fvdnabee/mspsim,nfi/mspsim,joakimeriksson/mspsim,joakimeriksson/mspsim,ransford/mspsim,mspsim/mspsim