Follow up #709

src/box/alter.cc

src/box/engine.h

src/box/errcode.h

src/box/key_def.cc

src/box/memtx_engine.cc

src/box/memtx_engine.h

src/box/sophia_engine.cc

src/box/sophia_engine.h

src/box/space.cc

src/box/space.h

src/box/tuple.cc

test/box/alter.result

test/box/alter_limits.result

test/box/rtree_misc.result

test/box/temp_spaces.result

test/sophia/dml.result

test/sophia/gh.result