array of undefined size, to avoid problems when compiled with -msda=4. * v850/sbrk.c (_sbrk): Change heap_start to be an array of undefined size, to avoid problems when compiled with -msda=4.
Base start of heap on the "heap_start" symbol. * libc/sys/sysnecv850/sbrk.c (_sbrk): Tidy code. Base start of heap on the "heap_start" symbol.