K 10 svn:author V 6 andrew K 8 svn:date V 27 2016-01-18T00:07:04.565173Z K 7 svn:log V 273 Add extra checks to make sure the size is valid. We may get an integer underflow when we have small blocks of memory at the start and end of the 32-bit address range. While here, only insert mappings pointing at a non-zero amount of memory. Sponsored by: ABT Systems Ltd END