* src/SDCCast.c: added an additional type flow in decorateType() of opposite directio...

* src/SDCCast.c: added an additional type flow in decorateType() of opposite direction, see feature request #860006; it's enabled at runtime by setting the environment variable SDCC_NEWTYPEFLOW
* src/SDCCast.h: changed prototype of decorateType()
* src/SDCCglue.c (emitRegularMap): updated call of decorateType()
* src/SDCCicode.c (geniCodeDivision) (geniCodeModulus): promotion from 'char' to 'int' can be omitted, if both operands are 'unsigned char'; see feature request #877103
* src/SDCCval.c: updated call of decorateType()
(valBitwise): fixed bug #882876
(valMinus): added promotion
(valLogicAndOr): result is unsigned
(cheapestVal) (constVal): literals from 0...255 are 'unsigned char' now
* src/SDCCsymt.c (computeType),
* src/mcs51/gen.c (genCmpGt) (genCmpLt): literal 'unsigned char' must not cause an unsigned operation
* src/pic/glue (pic14emitRegularMap),
* src/pic16/glue.c (pic16emitRegularMap): updated call of decorateType()

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@3150 4a8a32a2-be11-0410-ad9d-d568d2c75423