Replaced cast (void **) with (void *) to avoid gcc 3 warning:

Replaced cast (void **) with (void *) to avoid gcc 3 warning:
* src/SDCCcflow.c
* src/SDCCcse.c
* src/SDCCdflow.c
* src/SDCClabel.c
* src/SDCClrange.c
* src/SDCCmem.c
* src/SDCCopt.c
* src/SDCCpeeph.c
* src/SDCCset.c
* src/avr/ralloc.c
* src/ds390/ralloc.c
* src/izt/ralloc.c
* src/mcs51/ralloc.c
* src/pic/ralloc.c
* src/pic16/ralloc.c
* src/xa51/ralloc.c
* src/z80/ralloc.c
* src/z80/gen.c: removed unused label "release:"

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@2930 4a8a32a2-be11-0410-ad9d-d568d2c75423