compiler warnings in 5.1

[David Burgess <dburgess@...>]

If the target is to remove compiler warnings -

VC6 gives

lgc.c(121) : warning C4244: '=' : conversion from 'int ' to 'unsigned char ', po
ssible loss of data
lgc.c(415) : warning C4244: '=' : conversion from 'int ' to 'unsigned char ', po
ssible loss of data
lgc.c(456) : warning C4244: '=' : conversion from 'int ' to 'unsigned char ', po
ssible loss of data
lgc.c(668) : warning C4244: '=' : conversion from 'int ' to 'unsigned char ', po
ssible loss of data
lgc.c(703) : warning C4244: '=' : conversion from 'int ' to 'unsigned char ', po
ssible loss of data

lparser.c(588) : warning C4244: '=' : conversion from 'int ' to 'unsigned char '
, possible loss of data
lstate.c
lstring.c
lstring.c(82) : warning C4709: comma operator within array index expression
ltable.c
ltable.c(103) : warning C4709: comma operator within array index expression
ltable.c(105) : warning C4709: comma operator within array index expression
ltable.c(453) : warning C4709: comma operator within array index expression
ltm.c
lundump.c
lundump.c(125) : warning C4127: conditional expression is constant

liolib.c(198) : warning C4090: '=' : different 'const' qualifiers
liolib.c(486) : warning C4706: assignment within conditional expression
lmathlib.c
loslib.c
loslib.c(211) : warning C4702: unreachable code

DB