* src/SDCC.lex (doPragma): added pragma disable_warning <nnn>

* src/SDCCmain.c (parseCmdLine): added option --disable-warning <nnn>
* src/ds390/gen.c (genPlusIncr): fixed bug when incrementing generic pointers
* support/Util/SDCCerr.c (vwerror): suppress disabled warnings and output
  error/warning numbers,
  added function setWarningDisabled()
* support/Util/SDCCerr.h: added setWarningDisabled() and MAX_ERROR_WARNING
* support/regression/ports/mcs51-stack-auto/spec.mk: added dependencies
  _memcmp.c _memmove.c calloc.c realloc.c free.c
* support/regression/tests/malloc.c: added tests for new functionality
* support/regression/tests/zeropad.c: added tests for truncated initializers
  and initialized char arrays starting with '\\x0'
* src/mcs51/peeph.def: fixed regression, added peephole 177.f

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@3408 4a8a32a2-be11-0410-ad9d-d568d2c75423