ash: trivial simplifications and optimizations

function                                             old     new   delta
rmescapes                                              -     256    +256
memtodest                                             94     103      +9
evalvar                                             1363    1365      +2
_rmescapes                                           256       -    -256
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(add/remove: 1/1 grow/shrink: 2/0 up/down: 267/-256)           Total: 11 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
1 file changed