Fix variable names related to bytecode tracing.

Signed-off-by: Tony Yokoyama <chuuoudai@gmail.com>

The compile errors, encountered in the case that macro LOG_INSTR is
turned on, are fixed.

On branch log_instr
Changes to be committed:

	modified:   vm/mterp/armv5te/debug.c
	modified:   vm/mterp/c/gotoTargets.c
	modified:   vm/mterp/out/InterpC-allstubs.c
	modified:   vm/mterp/out/InterpC-armv4.c
	modified:   vm/mterp/out/InterpC-armv5te.c
	modified:   vm/mterp/out/InterpC-portdbg.c
	modified:   vm/mterp/out/InterpC-portstd.c
	modified:   vm/mterp/out/InterpC-x86.c
	modified:   vm/mterp/portable/debug.c
	modified:   vm/oo/Class.c