* src/vm/jit/code.h (codeinfo): Added synchronizedoffset

* src/vm/jit/code.h (codeinfo): Added synchronizedoffset
(temporarily).

* src/vm/exceptions.c (exceptions_handle_exception): Don't use IsSync
but code->synchronizedoffset.

* src/vm/jit/allocator/lsra.c,
src/vm/jit/allocator/simplereg.c,
src/vm/jit/code.c: Use code_is_synchronized.

* src/vm/jit/alpha/codegen.c,
src/vm/jit/arm/codegen.c,
src/vm/jit/i386/codegen.c,
src/vm/jit/m68k/codegen.c,
src/vm/jit/mips/codegen.c,
src/vm/jit/powerpc/codegen.c,
src/vm/jit/powerpc64/codegen.c,
src/vm/jit/s390/codegen.c,
src/vm/jit/sparc64/codegen.c,
src/vm/jit/x86_64/codegen.c: Use code_is_synchronized and set
code->synchronizedoffset.