[Bug libobjc/12035] New: Path for libobjc/gc.c that fixes compilation error of Objective-C with garbage collector enabled

["v dot haisman at sh dot cvut dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12035

           Summary: Path for libobjc/gc.c that fixes compilation error of
                    Objective-C with garbage collector enabled
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libobjc
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: v dot haisman at sh dot cvut dot cz
                CC: gcc-bugs at gcc dot gnu dot org,v dot haisman at sh dot
                    cvut dot cz
 GCC build triplet: i686-pc-cygwin
  GCC host triplet: i686-pc-cygwin
GCC target triplet: i686-pc-cygwin

I had to make this small change to libobjc/gc.c to be able to compile it. There
was missing definition for BITS_PER_WORD.